| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Brian King | 22558 | 71.87% | 66 | 37.93% |
| Tyrel Datwyler | 8456 | 26.94% | 61 | 35.06% |
| Hannes Reinecke | 107 | 0.34% | 3 | 1.72% |
| Johannes Thumshirn | 53 | 0.17% | 7 | 4.02% |
| Kees Cook | 42 | 0.13% | 1 | 0.57% |
| Bart Van Assche | 29 | 0.09% | 3 | 1.72% |
| Robert Jennings | 28 | 0.09% | 1 | 0.57% |
| Christoph Hellwig | 18 | 0.06% | 5 | 2.87% |
| Lee Jones | 15 | 0.05% | 1 | 0.57% |
| Martin K. Petersen | 14 | 0.04% | 2 | 1.15% |
| Kay Sievers | 7 | 0.02% | 1 | 0.57% |
| Michael Christie | 7 | 0.02% | 1 | 0.57% |
| Gustavo A. R. Silva | 6 | 0.02% | 1 | 0.57% |
| Chris Wright | 6 | 0.02% | 1 | 0.57% |
| Adam Radford | 6 | 0.02% | 1 | 0.57% |
| Stephen Rothwell | 5 | 0.02% | 1 | 0.57% |
| John Garry | 3 | 0.01% | 1 | 0.57% |
| Dan Carpenter | 3 | 0.01% | 1 | 0.57% |
| Jing Xiangfeng | 3 | 0.01% | 1 | 0.57% |
| Marc Zyngier | 3 | 0.01% | 1 | 0.57% |
| Linus Torvalds (pre-git) | 2 | 0.01% | 1 | 0.57% |
| FUJITA Tomonori | 2 | 0.01% | 1 | 0.57% |
| Arvind Yadav | 2 | 0.01% | 2 | 1.15% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.57% |
| Colin Ian King | 1 | 0.00% | 1 | 0.57% |
| Kieran Bingham | 1 | 0.00% | 1 | 0.57% |
| Jiapeng Chong | 1 | 0.00% | 1 | 0.57% |
| Sage Weil | 1 | 0.00% | 1 | 0.57% |
| Benjamin Herrenschmidt | 1 | 0.00% | 1 | 0.57% |
| Dongsheng Yang | 1 | 0.00% | 1 | 0.57% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.57% |
| Uwe Kleine-König | 1 | 0.00% | 1 | 0.57% |
| Wei Yongjun | 1 | 0.00% | 1 | 0.57% |
| Total | 31386 | 174 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * ibmvfc.c -- driver for IBM Power Virtual Fibre Channel Adapter * * Written By: Brian King <brking@linux.vnet.ibm.com>, IBM Corporation * * Copyright (C) IBM Corporation, 2008 */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/dma-mapping.h> #include <linux/dmapool.h> #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/irqdomain.h> #include <linux/kthread.h> #include <linux/slab.h> #include <linux/of.h> #include <linux/pm.h> #include <linux/stringify.h> #include <linux/bsg-lib.h> #include <asm/firmware.h> #include <asm/irq.h> #include <asm/vio.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_host.h> #include <scsi/scsi_device.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_transport_fc.h> #include <scsi/scsi_bsg_fc.h> #include "ibmvfc.h" static unsigned int init_timeout = IBMVFC_INIT_TIMEOUT; static unsigned int default_timeout = IBMVFC_DEFAULT_TIMEOUT; static u64 max_lun = IBMVFC_MAX_LUN; static unsigned int max_targets = IBMVFC_MAX_TARGETS; static unsigned int max_requests = IBMVFC_MAX_REQUESTS_DEFAULT; static u16 scsi_qdepth = IBMVFC_SCSI_QDEPTH; static unsigned int disc_threads = IBMVFC_MAX_DISC_THREADS; static unsigned int ibmvfc_debug = IBMVFC_DEBUG; static unsigned int log_level = IBMVFC_DEFAULT_LOG_LEVEL; static unsigned int cls3_error = IBMVFC_CLS3_ERROR; static unsigned int mq_enabled = IBMVFC_MQ; static unsigned int nr_scsi_hw_queues = IBMVFC_SCSI_HW_QUEUES; static unsigned int nr_scsi_channels = IBMVFC_SCSI_CHANNELS; static unsigned int mig_channels_only = IBMVFC_MIG_NO_SUB_TO_CRQ; static unsigned int mig_no_less_channels = IBMVFC_MIG_NO_N_TO_M; static LIST_HEAD(ibmvfc_head); static DEFINE_SPINLOCK(ibmvfc_driver_lock); static struct scsi_transport_template *ibmvfc_transport_template; MODULE_DESCRIPTION("IBM Virtual Fibre Channel Driver"); MODULE_AUTHOR("Brian King <brking@linux.vnet.ibm.com>"); MODULE_LICENSE("GPL"); MODULE_VERSION(IBMVFC_DRIVER_VERSION); module_param_named(mq, mq_enabled, uint, S_IRUGO); MODULE_PARM_DESC(mq, "Enable multiqueue support. " "[Default=" __stringify(IBMVFC_MQ) "]"); module_param_named(scsi_host_queues, nr_scsi_hw_queues, uint, S_IRUGO); MODULE_PARM_DESC(scsi_host_queues, "Number of SCSI Host submission queues. " "[Default=" __stringify(IBMVFC_SCSI_HW_QUEUES) "]"); module_param_named(scsi_hw_channels, nr_scsi_channels, uint, S_IRUGO); MODULE_PARM_DESC(scsi_hw_channels, "Number of hw scsi channels to request. " "[Default=" __stringify(IBMVFC_SCSI_CHANNELS) "]"); module_param_named(mig_channels_only, mig_channels_only, uint, S_IRUGO); MODULE_PARM_DESC(mig_channels_only, "Prevent migration to non-channelized system. " "[Default=" __stringify(IBMVFC_MIG_NO_SUB_TO_CRQ) "]"); module_param_named(mig_no_less_channels, mig_no_less_channels, uint, S_IRUGO); MODULE_PARM_DESC(mig_no_less_channels, "Prevent migration to system with less channels. " "[Default=" __stringify(IBMVFC_MIG_NO_N_TO_M) "]"); module_param_named(init_timeout, init_timeout, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds. " "[Default=" __stringify(IBMVFC_INIT_TIMEOUT) "]"); module_param_named(default_timeout, default_timeout, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(default_timeout, "Default timeout in seconds for initialization and EH commands. " "[Default=" __stringify(IBMVFC_DEFAULT_TIMEOUT) "]"); module_param_named(max_requests, max_requests, uint, S_IRUGO); MODULE_PARM_DESC(max_requests, "Maximum requests for this adapter. " "[Default=" __stringify(IBMVFC_MAX_REQUESTS_DEFAULT) "]"); module_param_named(scsi_qdepth, scsi_qdepth, ushort, S_IRUGO); MODULE_PARM_DESC(scsi_qdepth, "Maximum scsi command depth per adapter queue. " "[Default=" __stringify(IBMVFC_SCSI_QDEPTH) "]"); module_param_named(max_lun, max_lun, ullong, S_IRUGO); MODULE_PARM_DESC(max_lun, "Maximum allowed LUN. " "[Default=" __stringify(IBMVFC_MAX_LUN) "]"); module_param_named(max_targets, max_targets, uint, S_IRUGO); MODULE_PARM_DESC(max_targets, "Maximum allowed targets. " "[Default=" __stringify(IBMVFC_MAX_TARGETS) "]"); module_param_named(disc_threads, disc_threads, uint, S_IRUGO); MODULE_PARM_DESC(disc_threads, "Number of device discovery threads to use. " "[Default=" __stringify(IBMVFC_MAX_DISC_THREADS) "]"); module_param_named(debug, ibmvfc_debug, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(debug, "Enable driver debug information. " "[Default=" __stringify(IBMVFC_DEBUG) "]"); module_param_named(log_level, log_level, uint, 0); MODULE_PARM_DESC(log_level, "Set to 0 - 4 for increasing verbosity of device driver. " "[Default=" __stringify(IBMVFC_DEFAULT_LOG_LEVEL) "]"); module_param_named(cls3_error, cls3_error, uint, 0); MODULE_PARM_DESC(cls3_error, "Enable FC Class 3 Error Recovery. " "[Default=" __stringify(IBMVFC_CLS3_ERROR) "]"); static const struct { u16 status; u16 error; u8 result; u8 retry; int log; char *name; } cmd_status [] = { { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_ESTABLISH, DID_ERROR, 1, 1, "unable to establish" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_FAULT, DID_OK, 1, 0, "transport fault" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_CMD_TIMEOUT, DID_TIME_OUT, 1, 1, "command timeout" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_ENETDOWN, DID_TRANSPORT_DISRUPTED, 1, 1, "network down" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_HW_FAILURE, DID_ERROR, 1, 1, "hardware failure" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DOWN_ERR, DID_REQUEUE, 0, 0, "link down" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_DEAD_ERR, DID_ERROR, 0, 0, "link dead" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_UNABLE_TO_REGISTER, DID_ERROR, 1, 1, "unable to register" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_BUSY, DID_BUS_BUSY, 1, 0, "transport busy" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_DEAD, DID_ERROR, 0, 1, "transport dead" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_CONFIG_ERROR, DID_ERROR, 1, 1, "configuration error" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_NAME_SERVER_FAIL, DID_ERROR, 1, 1, "name server failure" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_LINK_HALTED, DID_REQUEUE, 1, 0, "link halted" }, { IBMVFC_FABRIC_MAPPED, IBMVFC_XPORT_GENERAL, DID_OK, 1, 0, "general transport error" }, { IBMVFC_VIOS_FAILURE, IBMVFC_CRQ_FAILURE, DID_REQUEUE, 1, 1, "CRQ failure" }, { IBMVFC_VIOS_FAILURE, IBMVFC_SW_FAILURE, DID_ERROR, 0, 1, "software failure" }, { IBMVFC_VIOS_FAILURE, IBMVFC_INVALID_PARAMETER, DID_ERROR, 0, 1, "invalid parameter" }, { IBMVFC_VIOS_FAILURE, IBMVFC_MISSING_PARAMETER, DID_ERROR, 0, 1, "missing parameter" }, { IBMVFC_VIOS_FAILURE, IBMVFC_HOST_IO_BUS, DID_ERROR, 1, 1, "host I/O bus failure" }, { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED, DID_ERROR, 0, 1, "transaction cancelled" }, { IBMVFC_VIOS_FAILURE, IBMVFC_TRANS_CANCELLED_IMPLICIT, DID_ERROR, 0, 1, "transaction cancelled implicit" }, { IBMVFC_VIOS_FAILURE, IBMVFC_INSUFFICIENT_RESOURCE, DID_REQUEUE, 1, 1, "insufficient resources" }, { IBMVFC_VIOS_FAILURE, IBMVFC_PLOGI_REQUIRED, DID_ERROR, 0, 1, "port login required" }, { IBMVFC_VIOS_FAILURE, IBMVFC_COMMAND_FAILED, DID_ERROR, 1, 1, "command failed" }, { IBMVFC_FC_FAILURE, IBMVFC_INVALID_ELS_CMD_CODE, DID_ERROR, 0, 1, "invalid ELS command code" }, { IBMVFC_FC_FAILURE, IBMVFC_INVALID_VERSION, DID_ERROR, 0, 1, "invalid version level" }, { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_ERROR, DID_ERROR, 1, 1, "logical error" }, { IBMVFC_FC_FAILURE, IBMVFC_INVALID_CT_IU_SIZE, DID_ERROR, 0, 1, "invalid CT_IU size" }, { IBMVFC_FC_FAILURE, IBMVFC_LOGICAL_BUSY, DID_REQUEUE, 1, 0, "logical busy" }, { IBMVFC_FC_FAILURE, IBMVFC_PROTOCOL_ERROR, DID_ERROR, 1, 1, "protocol error" }, { IBMVFC_FC_FAILURE, IBMVFC_UNABLE_TO_PERFORM_REQ, DID_ERROR, 1, 1, "unable to perform request" }, { IBMVFC_FC_FAILURE, IBMVFC_CMD_NOT_SUPPORTED, DID_ERROR, 0, 0, "command not supported" }, { IBMVFC_FC_FAILURE, IBMVFC_SERVER_NOT_AVAIL, DID_ERROR, 0, 1, "server not available" }, { IBMVFC_FC_FAILURE, IBMVFC_CMD_IN_PROGRESS, DID_ERROR, 0, 1, "command already in progress" }, { IBMVFC_FC_FAILURE, IBMVFC_VENDOR_SPECIFIC, DID_ERROR, 1, 1, "vendor specific" }, { IBMVFC_FC_SCSI_ERROR, 0, DID_OK, 1, 0, "SCSI error" }, { IBMVFC_FC_SCSI_ERROR, IBMVFC_COMMAND_FAILED, DID_ERROR, 0, 1, "PRLI to device failed." }, }; static void ibmvfc_npiv_login(struct ibmvfc_host *); static void ibmvfc_tgt_send_prli(struct ibmvfc_target *); static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *); static void ibmvfc_tgt_query_target(struct ibmvfc_target *); static void ibmvfc_npiv_logout(struct ibmvfc_host *); static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *); static void ibmvfc_tgt_move_login(struct ibmvfc_target *); static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *, struct ibmvfc_channels *); static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *, struct ibmvfc_channels *); static const char *unknown_error = "unknown error"; static long h_reg_sub_crq(unsigned long unit_address, unsigned long ioba, unsigned long length, unsigned long *cookie, unsigned long *irq) { unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; long rc; rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, ioba, length); *cookie = retbuf[0]; *irq = retbuf[1]; return rc; } static int ibmvfc_check_caps(struct ibmvfc_host *vhost, unsigned long cap_flags) { u64 host_caps = be64_to_cpu(vhost->login_buf->resp.capabilities); return (host_caps & cap_flags) ? 1 : 0; } static struct ibmvfc_fcp_cmd_iu *ibmvfc_get_fcp_iu(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) { if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) return &vfc_cmd->v2.iu; else return &vfc_cmd->v1.iu; } static struct ibmvfc_fcp_rsp *ibmvfc_get_fcp_rsp(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) { if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) return &vfc_cmd->v2.rsp; else return &vfc_cmd->v1.rsp; } #ifdef CONFIG_SCSI_IBMVFC_TRACE /** * ibmvfc_trc_start - Log a start trace entry * @evt: ibmvfc event struct * **/ static void ibmvfc_trc_start(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; struct ibmvfc_mad_common *mad = &evt->iu.mad_common; struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); struct ibmvfc_trace_entry *entry; int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; entry = &vhost->trace[index]; entry->evt = evt; entry->time = jiffies; entry->fmt = evt->crq.format; entry->type = IBMVFC_TRC_START; switch (entry->fmt) { case IBMVFC_CMD_FORMAT: entry->op_code = iu->cdb[0]; entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); entry->lun = scsilun_to_int(&iu->lun); entry->tmf_flags = iu->tmf_flags; entry->u.start.xfer_len = be32_to_cpu(iu->xfer_len); break; case IBMVFC_MAD_FORMAT: entry->op_code = be32_to_cpu(mad->opcode); break; default: break; } } /** * ibmvfc_trc_end - Log an end trace entry * @evt: ibmvfc event struct * **/ static void ibmvfc_trc_end(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; struct ibmvfc_mad_common *mad = &evt->xfer_iu->mad_common; struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); struct ibmvfc_trace_entry *entry; int index = atomic_inc_return(&vhost->trace_index) & IBMVFC_TRACE_INDEX_MASK; entry = &vhost->trace[index]; entry->evt = evt; entry->time = jiffies; entry->fmt = evt->crq.format; entry->type = IBMVFC_TRC_END; switch (entry->fmt) { case IBMVFC_CMD_FORMAT: entry->op_code = iu->cdb[0]; entry->scsi_id = be64_to_cpu(vfc_cmd->tgt_scsi_id); entry->lun = scsilun_to_int(&iu->lun); entry->tmf_flags = iu->tmf_flags; entry->u.end.status = be16_to_cpu(vfc_cmd->status); entry->u.end.error = be16_to_cpu(vfc_cmd->error); entry->u.end.fcp_rsp_flags = rsp->flags; entry->u.end.rsp_code = rsp->data.info.rsp_code; entry->u.end.scsi_status = rsp->scsi_status; break; case IBMVFC_MAD_FORMAT: entry->op_code = be32_to_cpu(mad->opcode); entry->u.end.status = be16_to_cpu(mad->status); break; default: break; } } #else #define ibmvfc_trc_start(evt) do { } while (0) #define ibmvfc_trc_end(evt) do { } while (0) #endif /** * ibmvfc_get_err_index - Find the index into cmd_status for the fcp response * @status: status / error class * @error: error * * Return value: * index into cmd_status / -EINVAL on failure **/ static int ibmvfc_get_err_index(u16 status, u16 error) { int i; for (i = 0; i < ARRAY_SIZE(cmd_status); i++) if ((cmd_status[i].status & status) == cmd_status[i].status && cmd_status[i].error == error) return i; return -EINVAL; } /** * ibmvfc_get_cmd_error - Find the error description for the fcp response * @status: status / error class * @error: error * * Return value: * error description string **/ static const char *ibmvfc_get_cmd_error(u16 status, u16 error) { int rc = ibmvfc_get_err_index(status, error); if (rc >= 0) return cmd_status[rc].name; return unknown_error; } /** * ibmvfc_get_err_result - Find the scsi status to return for the fcp response * @vhost: ibmvfc host struct * @vfc_cmd: ibmvfc command struct * * Return value: * SCSI result value to return for completed command **/ static int ibmvfc_get_err_result(struct ibmvfc_host *vhost, struct ibmvfc_cmd *vfc_cmd) { int err; struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); int fc_rsp_len = be32_to_cpu(rsp->fcp_rsp_len); if ((rsp->flags & FCP_RSP_LEN_VALID) && ((fc_rsp_len && fc_rsp_len != 4 && fc_rsp_len != 8) || rsp->data.info.rsp_code)) return DID_ERROR << 16; err = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); if (err >= 0) return rsp->scsi_status | (cmd_status[err].result << 16); return rsp->scsi_status | (DID_ERROR << 16); } /** * ibmvfc_retry_cmd - Determine if error status is retryable * @status: status / error class * @error: error * * Return value: * 1 if error should be retried / 0 if it should not **/ static int ibmvfc_retry_cmd(u16 status, u16 error) { int rc = ibmvfc_get_err_index(status, error); if (rc >= 0) return cmd_status[rc].retry; return 1; } static const char *unknown_fc_explain = "unknown fc explain"; static const struct { u16 fc_explain; char *name; } ls_explain [] = { { 0x00, "no additional explanation" }, { 0x01, "service parameter error - options" }, { 0x03, "service parameter error - initiator control" }, { 0x05, "service parameter error - recipient control" }, { 0x07, "service parameter error - received data field size" }, { 0x09, "service parameter error - concurrent seq" }, { 0x0B, "service parameter error - credit" }, { 0x0D, "invalid N_Port/F_Port_Name" }, { 0x0E, "invalid node/Fabric Name" }, { 0x0F, "invalid common service parameters" }, { 0x11, "invalid association header" }, { 0x13, "association header required" }, { 0x15, "invalid originator S_ID" }, { 0x17, "invalid OX_ID-RX-ID combination" }, { 0x19, "command (request) already in progress" }, { 0x1E, "N_Port Login requested" }, { 0x1F, "Invalid N_Port_ID" }, }; static const struct { u16 fc_explain; char *name; } gs_explain [] = { { 0x00, "no additional explanation" }, { 0x01, "port identifier not registered" }, { 0x02, "port name not registered" }, { 0x03, "node name not registered" }, { 0x04, "class of service not registered" }, { 0x06, "initial process associator not registered" }, { 0x07, "FC-4 TYPEs not registered" }, { 0x08, "symbolic port name not registered" }, { 0x09, "symbolic node name not registered" }, { 0x0A, "port type not registered" }, { 0xF0, "authorization exception" }, { 0xF1, "authentication exception" }, { 0xF2, "data base full" }, { 0xF3, "data base empty" }, { 0xF4, "processing request" }, { 0xF5, "unable to verify connection" }, { 0xF6, "devices not in a common zone" }, }; /** * ibmvfc_get_ls_explain - Return the FC Explain description text * @status: FC Explain status * * Returns: * error string **/ static const char *ibmvfc_get_ls_explain(u16 status) { int i; for (i = 0; i < ARRAY_SIZE(ls_explain); i++) if (ls_explain[i].fc_explain == status) return ls_explain[i].name; return unknown_fc_explain; } /** * ibmvfc_get_gs_explain - Return the FC Explain description text * @status: FC Explain status * * Returns: * error string **/ static const char *ibmvfc_get_gs_explain(u16 status) { int i; for (i = 0; i < ARRAY_SIZE(gs_explain); i++) if (gs_explain[i].fc_explain == status) return gs_explain[i].name; return unknown_fc_explain; } static const struct { enum ibmvfc_fc_type fc_type; char *name; } fc_type [] = { { IBMVFC_FABRIC_REJECT, "fabric reject" }, { IBMVFC_PORT_REJECT, "port reject" }, { IBMVFC_LS_REJECT, "ELS reject" }, { IBMVFC_FABRIC_BUSY, "fabric busy" }, { IBMVFC_PORT_BUSY, "port busy" }, { IBMVFC_BASIC_REJECT, "basic reject" }, }; static const char *unknown_fc_type = "unknown fc type"; /** * ibmvfc_get_fc_type - Return the FC Type description text * @status: FC Type error status * * Returns: * error string **/ static const char *ibmvfc_get_fc_type(u16 status) { int i; for (i = 0; i < ARRAY_SIZE(fc_type); i++) if (fc_type[i].fc_type == status) return fc_type[i].name; return unknown_fc_type; } /** * ibmvfc_set_tgt_action - Set the next init action for the target * @tgt: ibmvfc target struct * @action: action to perform * * Returns: * 0 if action changed / non-zero if not changed **/ static int ibmvfc_set_tgt_action(struct ibmvfc_target *tgt, enum ibmvfc_target_action action) { int rc = -EINVAL; switch (tgt->action) { case IBMVFC_TGT_ACTION_LOGOUT_RPORT: if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT || action == IBMVFC_TGT_ACTION_DEL_RPORT) { tgt->action = action; rc = 0; } break; case IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT: if (action == IBMVFC_TGT_ACTION_DEL_RPORT || action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { tgt->action = action; rc = 0; } break; case IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT: if (action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { tgt->action = action; rc = 0; } break; case IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT: if (action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { tgt->action = action; rc = 0; } break; case IBMVFC_TGT_ACTION_DEL_RPORT: if (action == IBMVFC_TGT_ACTION_DELETED_RPORT) { tgt->action = action; rc = 0; } break; case IBMVFC_TGT_ACTION_DELETED_RPORT: break; default: tgt->action = action; rc = 0; break; } if (action >= IBMVFC_TGT_ACTION_LOGOUT_RPORT) tgt->add_rport = 0; return rc; } /** * ibmvfc_set_host_state - Set the state for the host * @vhost: ibmvfc host struct * @state: state to set host to * * Returns: * 0 if state changed / non-zero if not changed **/ static int ibmvfc_set_host_state(struct ibmvfc_host *vhost, enum ibmvfc_host_state state) { int rc = 0; switch (vhost->state) { case IBMVFC_HOST_OFFLINE: rc = -EINVAL; break; default: vhost->state = state; break; } return rc; } /** * ibmvfc_set_host_action - Set the next init action for the host * @vhost: ibmvfc host struct * @action: action to perform * **/ static void ibmvfc_set_host_action(struct ibmvfc_host *vhost, enum ibmvfc_host_action action) { switch (action) { case IBMVFC_HOST_ACTION_ALLOC_TGTS: if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) vhost->action = action; break; case IBMVFC_HOST_ACTION_LOGO_WAIT: if (vhost->action == IBMVFC_HOST_ACTION_LOGO) vhost->action = action; break; case IBMVFC_HOST_ACTION_INIT_WAIT: if (vhost->action == IBMVFC_HOST_ACTION_INIT) vhost->action = action; break; case IBMVFC_HOST_ACTION_QUERY: switch (vhost->action) { case IBMVFC_HOST_ACTION_INIT_WAIT: case IBMVFC_HOST_ACTION_NONE: case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: vhost->action = action; break; default: break; } break; case IBMVFC_HOST_ACTION_TGT_INIT: if (vhost->action == IBMVFC_HOST_ACTION_ALLOC_TGTS) vhost->action = action; break; case IBMVFC_HOST_ACTION_REENABLE: case IBMVFC_HOST_ACTION_RESET: vhost->action = action; break; case IBMVFC_HOST_ACTION_INIT: case IBMVFC_HOST_ACTION_TGT_DEL: case IBMVFC_HOST_ACTION_LOGO: case IBMVFC_HOST_ACTION_QUERY_TGTS: case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: case IBMVFC_HOST_ACTION_NONE: default: switch (vhost->action) { case IBMVFC_HOST_ACTION_RESET: case IBMVFC_HOST_ACTION_REENABLE: break; default: vhost->action = action; break; } break; } } /** * ibmvfc_reinit_host - Re-start host initialization (no NPIV Login) * @vhost: ibmvfc host struct * * Return value: * nothing **/ static void ibmvfc_reinit_host(struct ibmvfc_host *vhost) { if (vhost->action == IBMVFC_HOST_ACTION_NONE && vhost->state == IBMVFC_ACTIVE) { if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { scsi_block_requests(vhost->host); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); } } else vhost->reinit = 1; wake_up(&vhost->work_wait_q); } /** * ibmvfc_del_tgt - Schedule cleanup and removal of the target * @tgt: ibmvfc target struct **/ static void ibmvfc_del_tgt(struct ibmvfc_target *tgt) { if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT)) { tgt->job_step = ibmvfc_tgt_implicit_logout_and_del; tgt->init_retries = 0; } wake_up(&tgt->vhost->work_wait_q); } /** * ibmvfc_link_down - Handle a link down event from the adapter * @vhost: ibmvfc host struct * @state: ibmvfc host state to enter * **/ static void ibmvfc_link_down(struct ibmvfc_host *vhost, enum ibmvfc_host_state state) { struct ibmvfc_target *tgt; ENTER; scsi_block_requests(vhost->host); list_for_each_entry(tgt, &vhost->targets, queue) ibmvfc_del_tgt(tgt); ibmvfc_set_host_state(vhost, state); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); vhost->events_to_log |= IBMVFC_AE_LINKDOWN; wake_up(&vhost->work_wait_q); LEAVE; } /** * ibmvfc_init_host - Start host initialization * @vhost: ibmvfc host struct * * Return value: * nothing **/ static void ibmvfc_init_host(struct ibmvfc_host *vhost) { struct ibmvfc_target *tgt; if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { dev_err(vhost->dev, "Host initialization retries exceeded. Taking adapter offline\n"); ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); return; } } if (!ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { memset(vhost->async_crq.msgs.async, 0, PAGE_SIZE); vhost->async_crq.cur = 0; list_for_each_entry(tgt, &vhost->targets, queue) { if (vhost->client_migrated) tgt->need_login = 1; else ibmvfc_del_tgt(tgt); } scsi_block_requests(vhost->host); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); vhost->job_step = ibmvfc_npiv_login; wake_up(&vhost->work_wait_q); } } /** * ibmvfc_send_crq - Send a CRQ * @vhost: ibmvfc host struct * @word1: the first 64 bits of the data * @word2: the second 64 bits of the data * * Return value: * 0 on success / other on failure **/ static int ibmvfc_send_crq(struct ibmvfc_host *vhost, u64 word1, u64 word2) { struct vio_dev *vdev = to_vio_dev(vhost->dev); return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); } static int ibmvfc_send_sub_crq(struct ibmvfc_host *vhost, u64 cookie, u64 word1, u64 word2, u64 word3, u64 word4) { struct vio_dev *vdev = to_vio_dev(vhost->dev); return plpar_hcall_norets(H_SEND_SUB_CRQ, vdev->unit_address, cookie, word1, word2, word3, word4); } /** * ibmvfc_send_crq_init - Send a CRQ init message * @vhost: ibmvfc host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_send_crq_init(struct ibmvfc_host *vhost) { ibmvfc_dbg(vhost, "Sending CRQ init\n"); return ibmvfc_send_crq(vhost, 0xC001000000000000LL, 0); } /** * ibmvfc_send_crq_init_complete - Send a CRQ init complete message * @vhost: ibmvfc host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_send_crq_init_complete(struct ibmvfc_host *vhost) { ibmvfc_dbg(vhost, "Sending CRQ init complete\n"); return ibmvfc_send_crq(vhost, 0xC002000000000000LL, 0); } /** * ibmvfc_init_event_pool - Allocates and initializes the event pool for a host * @vhost: ibmvfc host who owns the event pool * @queue: ibmvfc queue struct * * Returns zero on success. **/ static int ibmvfc_init_event_pool(struct ibmvfc_host *vhost, struct ibmvfc_queue *queue) { int i; struct ibmvfc_event_pool *pool = &queue->evt_pool; ENTER; if (!queue->total_depth) return 0; pool->size = queue->total_depth; pool->events = kcalloc(pool->size, sizeof(*pool->events), GFP_KERNEL); if (!pool->events) return -ENOMEM; pool->iu_storage = dma_alloc_coherent(vhost->dev, pool->size * sizeof(*pool->iu_storage), &pool->iu_token, 0); if (!pool->iu_storage) { kfree(pool->events); return -ENOMEM; } INIT_LIST_HEAD(&queue->sent); INIT_LIST_HEAD(&queue->free); queue->evt_free = queue->evt_depth; queue->reserved_free = queue->reserved_depth; spin_lock_init(&queue->l_lock); for (i = 0; i < pool->size; ++i) { struct ibmvfc_event *evt = &pool->events[i]; /* * evt->active states * 1 = in flight * 0 = being completed * -1 = free/freed */ atomic_set(&evt->active, -1); atomic_set(&evt->free, 1); evt->crq.valid = 0x80; evt->crq.ioba = cpu_to_be64(pool->iu_token + (sizeof(*evt->xfer_iu) * i)); evt->xfer_iu = pool->iu_storage + i; evt->vhost = vhost; evt->queue = queue; evt->ext_list = NULL; list_add_tail(&evt->queue_list, &queue->free); } LEAVE; return 0; } /** * ibmvfc_free_event_pool - Frees memory of the event pool of a host * @vhost: ibmvfc host who owns the event pool * @queue: ibmvfc queue struct * **/ static void ibmvfc_free_event_pool(struct ibmvfc_host *vhost, struct ibmvfc_queue *queue) { int i; struct ibmvfc_event_pool *pool = &queue->evt_pool; ENTER; for (i = 0; i < pool->size; ++i) { list_del(&pool->events[i].queue_list); BUG_ON(atomic_read(&pool->events[i].free) != 1); if (pool->events[i].ext_list) dma_pool_free(vhost->sg_pool, pool->events[i].ext_list, pool->events[i].ext_list_token); } kfree(pool->events); dma_free_coherent(vhost->dev, pool->size * sizeof(*pool->iu_storage), pool->iu_storage, pool->iu_token); LEAVE; } /** * ibmvfc_free_queue - Deallocate queue * @vhost: ibmvfc host struct * @queue: ibmvfc queue struct * * Unmaps dma and deallocates page for messages **/ static void ibmvfc_free_queue(struct ibmvfc_host *vhost, struct ibmvfc_queue *queue) { struct device *dev = vhost->dev; dma_unmap_single(dev, queue->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); free_page((unsigned long)queue->msgs.handle); queue->msgs.handle = NULL; ibmvfc_free_event_pool(vhost, queue); } /** * ibmvfc_release_crq_queue - Deallocates data and unregisters CRQ * @vhost: ibmvfc host struct * * Frees irq, deallocates a page for messages, unmaps dma, and unregisters * the crq with the hypervisor. **/ static void ibmvfc_release_crq_queue(struct ibmvfc_host *vhost) { long rc = 0; struct vio_dev *vdev = to_vio_dev(vhost->dev); struct ibmvfc_queue *crq = &vhost->crq; ibmvfc_dbg(vhost, "Releasing CRQ\n"); free_irq(vdev->irq, vhost); tasklet_kill(&vhost->tasklet); do { if (rc) msleep(100); rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); vhost->state = IBMVFC_NO_CRQ; vhost->logged_in = 0; ibmvfc_free_queue(vhost, crq); } /** * ibmvfc_reenable_crq_queue - reenables the CRQ * @vhost: ibmvfc host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_reenable_crq_queue(struct ibmvfc_host *vhost) { int rc = 0; struct vio_dev *vdev = to_vio_dev(vhost->dev); unsigned long flags; ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); /* Re-enable the CRQ */ do { if (rc) msleep(100); rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); if (rc) dev_err(vhost->dev, "Error enabling adapter (rc=%d)\n", rc); spin_lock_irqsave(vhost->host->host_lock, flags); spin_lock(vhost->crq.q_lock); vhost->do_enquiry = 1; vhost->using_channels = 0; spin_unlock(vhost->crq.q_lock); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); return rc; } /** * ibmvfc_reset_crq - resets a crq after a failure * @vhost: ibmvfc host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) { int rc = 0; unsigned long flags; struct vio_dev *vdev = to_vio_dev(vhost->dev); struct ibmvfc_queue *crq = &vhost->crq; ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); /* Close the CRQ */ do { if (rc) msleep(100); rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); spin_lock_irqsave(vhost->host->host_lock, flags); spin_lock(vhost->crq.q_lock); vhost->state = IBMVFC_NO_CRQ; vhost->logged_in = 0; vhost->do_enquiry = 1; vhost->using_channels = 0; /* Clean out the queue */ memset(crq->msgs.crq, 0, PAGE_SIZE); crq->cur = 0; /* And re-open it again */ rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, crq->msg_token, PAGE_SIZE); if (rc == H_CLOSED) /* Adapter is good, but other end is not ready */ dev_warn(vhost->dev, "Partner adapter not ready\n"); else if (rc != 0) dev_warn(vhost->dev, "Couldn't register crq (rc=%d)\n", rc); spin_unlock(vhost->crq.q_lock); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); return rc; } /** * ibmvfc_valid_event - Determines if event is valid. * @pool: event_pool that contains the event * @evt: ibmvfc event to be checked for validity * * Return value: * 1 if event is valid / 0 if event is not valid **/ static int ibmvfc_valid_event(struct ibmvfc_event_pool *pool, struct ibmvfc_event *evt) { int index = evt - pool->events; if (index < 0 || index >= pool->size) /* outside of bounds */ return 0; if (evt != pool->events + index) /* unaligned */ return 0; return 1; } /** * ibmvfc_free_event - Free the specified event * @evt: ibmvfc_event to be freed * **/ static void ibmvfc_free_event(struct ibmvfc_event *evt) { struct ibmvfc_event_pool *pool = &evt->queue->evt_pool; unsigned long flags; BUG_ON(!ibmvfc_valid_event(pool, evt)); BUG_ON(atomic_inc_return(&evt->free) != 1); BUG_ON(atomic_dec_and_test(&evt->active)); spin_lock_irqsave(&evt->queue->l_lock, flags); list_add_tail(&evt->queue_list, &evt->queue->free); if (evt->reserved) { evt->reserved = 0; evt->queue->reserved_free++; } else { evt->queue->evt_free++; } if (evt->eh_comp) complete(evt->eh_comp); spin_unlock_irqrestore(&evt->queue->l_lock, flags); } /** * ibmvfc_scsi_eh_done - EH done function for queuecommand commands * @evt: ibmvfc event struct * * This function does not setup any error status, that must be done * before this function gets called. **/ static void ibmvfc_scsi_eh_done(struct ibmvfc_event *evt) { struct scsi_cmnd *cmnd = evt->cmnd; if (cmnd) { scsi_dma_unmap(cmnd); scsi_done(cmnd); } ibmvfc_free_event(evt); } /** * ibmvfc_complete_purge - Complete failed command list * @purge_list: list head of failed commands * * This function runs completions on commands to fail as a result of a * host reset or platform migration. **/ static void ibmvfc_complete_purge(struct list_head *purge_list) { struct ibmvfc_event *evt, *pos; list_for_each_entry_safe(evt, pos, purge_list, queue_list) { list_del(&evt->queue_list); ibmvfc_trc_end(evt); evt->done(evt); } } /** * ibmvfc_fail_request - Fail request with specified error code * @evt: ibmvfc event struct * @error_code: error code to fail request with * * Return value: * none **/ static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) { /* * Anything we are failing should still be active. Otherwise, it * implies we already got a response for the command and are doing * something bad like double completing it. */ BUG_ON(!atomic_dec_and_test(&evt->active)); if (evt->cmnd) { evt->cmnd->result = (error_code << 16); evt->done = ibmvfc_scsi_eh_done; } else evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_DRIVER_FAILED); del_timer(&evt->timer); } /** * ibmvfc_purge_requests - Our virtual adapter just shut down. Purge any sent requests * @vhost: ibmvfc host struct * @error_code: error code to fail requests with * * Return value: * none **/ static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) { struct ibmvfc_event *evt, *pos; struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; unsigned long flags; int hwqs = 0; int i; if (vhost->using_channels) hwqs = vhost->scsi_scrqs.active_queues; ibmvfc_dbg(vhost, "Purging all requests\n"); spin_lock_irqsave(&vhost->crq.l_lock, flags); list_for_each_entry_safe(evt, pos, &vhost->crq.sent, queue_list) ibmvfc_fail_request(evt, error_code); list_splice_init(&vhost->crq.sent, &vhost->purge); spin_unlock_irqrestore(&vhost->crq.l_lock, flags); for (i = 0; i < hwqs; i++) { spin_lock_irqsave(queues[i].q_lock, flags); spin_lock(&queues[i].l_lock); list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) ibmvfc_fail_request(evt, error_code); list_splice_init(&queues[i].sent, &vhost->purge); spin_unlock(&queues[i].l_lock); spin_unlock_irqrestore(queues[i].q_lock, flags); } } /** * ibmvfc_hard_reset_host - Reset the connection to the server by breaking the CRQ * @vhost: struct ibmvfc host to reset **/ static void ibmvfc_hard_reset_host(struct ibmvfc_host *vhost) { ibmvfc_purge_requests(vhost, DID_ERROR); ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); } /** * __ibmvfc_reset_host - Reset the connection to the server (no locking) * @vhost: struct ibmvfc host to reset **/ static void __ibmvfc_reset_host(struct ibmvfc_host *vhost) { if (vhost->logged_in && vhost->action != IBMVFC_HOST_ACTION_LOGO_WAIT && !ibmvfc_set_host_state(vhost, IBMVFC_INITIALIZING)) { scsi_block_requests(vhost->host); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO); vhost->job_step = ibmvfc_npiv_logout; wake_up(&vhost->work_wait_q); } else ibmvfc_hard_reset_host(vhost); } /** * ibmvfc_reset_host - Reset the connection to the server * @vhost: ibmvfc host struct **/ static void ibmvfc_reset_host(struct ibmvfc_host *vhost) { unsigned long flags; spin_lock_irqsave(vhost->host->host_lock, flags); __ibmvfc_reset_host(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); } /** * ibmvfc_retry_host_init - Retry host initialization if allowed * @vhost: ibmvfc host struct * * Returns: 1 if init will be retried / 0 if not * **/ static int ibmvfc_retry_host_init(struct ibmvfc_host *vhost) { int retry = 0; if (vhost->action == IBMVFC_HOST_ACTION_INIT_WAIT) { vhost->delay_init = 1; if (++vhost->init_retries > IBMVFC_MAX_HOST_INIT_RETRIES) { dev_err(vhost->dev, "Host initialization retries exceeded. Taking adapter offline\n"); ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); } else if (vhost->init_retries == IBMVFC_MAX_HOST_INIT_RETRIES) __ibmvfc_reset_host(vhost); else { ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); retry = 1; } } wake_up(&vhost->work_wait_q); return retry; } /** * __ibmvfc_get_target - Find the specified scsi_target (no locking) * @starget: scsi target struct * * Return value: * ibmvfc_target struct / NULL if not found **/ static struct ibmvfc_target *__ibmvfc_get_target(struct scsi_target *starget) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ibmvfc_host *vhost = shost_priv(shost); struct ibmvfc_target *tgt; list_for_each_entry(tgt, &vhost->targets, queue) if (tgt->target_id == starget->id) { kref_get(&tgt->kref); return tgt; } return NULL; } /** * ibmvfc_get_target - Find the specified scsi_target * @starget: scsi target struct * * Return value: * ibmvfc_target struct / NULL if not found **/ static struct ibmvfc_target *ibmvfc_get_target(struct scsi_target *starget) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ibmvfc_target *tgt; unsigned long flags; spin_lock_irqsave(shost->host_lock, flags); tgt = __ibmvfc_get_target(starget); spin_unlock_irqrestore(shost->host_lock, flags); return tgt; } /** * ibmvfc_get_host_speed - Get host port speed * @shost: scsi host struct * * Return value: * none **/ static void ibmvfc_get_host_speed(struct Scsi_Host *shost) { struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags; spin_lock_irqsave(shost->host_lock, flags); if (vhost->state == IBMVFC_ACTIVE) { switch (be64_to_cpu(vhost->login_buf->resp.link_speed) / 100) { case 1: fc_host_speed(shost) = FC_PORTSPEED_1GBIT; break; case 2: fc_host_speed(shost) = FC_PORTSPEED_2GBIT; break; case 4: fc_host_speed(shost) = FC_PORTSPEED_4GBIT; break; case 8: fc_host_speed(shost) = FC_PORTSPEED_8GBIT; break; case 10: fc_host_speed(shost) = FC_PORTSPEED_10GBIT; break; case 16: fc_host_speed(shost) = FC_PORTSPEED_16GBIT; break; default: ibmvfc_log(vhost, 3, "Unknown port speed: %lld Gbit\n", be64_to_cpu(vhost->login_buf->resp.link_speed) / 100); fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; break; } } else fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; spin_unlock_irqrestore(shost->host_lock, flags); } /** * ibmvfc_get_host_port_state - Get host port state * @shost: scsi host struct * * Return value: * none **/ static void ibmvfc_get_host_port_state(struct Scsi_Host *shost) { struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags; spin_lock_irqsave(shost->host_lock, flags); switch (vhost->state) { case IBMVFC_INITIALIZING: case IBMVFC_ACTIVE: fc_host_port_state(shost) = FC_PORTSTATE_ONLINE; break; case IBMVFC_LINK_DOWN: fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN; break; case IBMVFC_LINK_DEAD: case IBMVFC_HOST_OFFLINE: fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE; break; case IBMVFC_HALTED: fc_host_port_state(shost) = FC_PORTSTATE_BLOCKED; break; case IBMVFC_NO_CRQ: fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; break; default: ibmvfc_log(vhost, 3, "Unknown port state: %d\n", vhost->state); fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN; break; } spin_unlock_irqrestore(shost->host_lock, flags); } /** * ibmvfc_set_rport_dev_loss_tmo - Set rport's device loss timeout * @rport: rport struct * @timeout: timeout value * * Return value: * none **/ static void ibmvfc_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) { if (timeout) rport->dev_loss_tmo = timeout; else rport->dev_loss_tmo = 1; } /** * ibmvfc_release_tgt - Free memory allocated for a target * @kref: kref struct * **/ static void ibmvfc_release_tgt(struct kref *kref) { struct ibmvfc_target *tgt = container_of(kref, struct ibmvfc_target, kref); kfree(tgt); } /** * ibmvfc_get_starget_node_name - Get SCSI target's node name * @starget: scsi target struct * * Return value: * none **/ static void ibmvfc_get_starget_node_name(struct scsi_target *starget) { struct ibmvfc_target *tgt = ibmvfc_get_target(starget); fc_starget_port_name(starget) = tgt ? tgt->ids.node_name : 0; if (tgt) kref_put(&tgt->kref, ibmvfc_release_tgt); } /** * ibmvfc_get_starget_port_name - Get SCSI target's port name * @starget: scsi target struct * * Return value: * none **/ static void ibmvfc_get_starget_port_name(struct scsi_target *starget) { struct ibmvfc_target *tgt = ibmvfc_get_target(starget); fc_starget_port_name(starget) = tgt ? tgt->ids.port_name : 0; if (tgt) kref_put(&tgt->kref, ibmvfc_release_tgt); } /** * ibmvfc_get_starget_port_id - Get SCSI target's port ID * @starget: scsi target struct * * Return value: * none **/ static void ibmvfc_get_starget_port_id(struct scsi_target *starget) { struct ibmvfc_target *tgt = ibmvfc_get_target(starget); fc_starget_port_id(starget) = tgt ? tgt->scsi_id : -1; if (tgt) kref_put(&tgt->kref, ibmvfc_release_tgt); } /** * ibmvfc_wait_while_resetting - Wait while the host resets * @vhost: ibmvfc host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_wait_while_resetting(struct ibmvfc_host *vhost) { long timeout = wait_event_timeout(vhost->init_wait_q, ((vhost->state == IBMVFC_ACTIVE || vhost->state == IBMVFC_HOST_OFFLINE || vhost->state == IBMVFC_LINK_DEAD) && vhost->action == IBMVFC_HOST_ACTION_NONE), (init_timeout * HZ)); return timeout ? 0 : -EIO; } /** * ibmvfc_issue_fc_host_lip - Re-initiate link initialization * @shost: scsi host struct * * Return value: * 0 on success / other on failure **/ static int ibmvfc_issue_fc_host_lip(struct Scsi_Host *shost) { struct ibmvfc_host *vhost = shost_priv(shost); dev_err(vhost->dev, "Initiating host LIP. Resetting connection\n"); ibmvfc_reset_host(vhost); return ibmvfc_wait_while_resetting(vhost); } /** * ibmvfc_gather_partition_info - Gather info about the LPAR * @vhost: ibmvfc host struct * * Return value: * none **/ static void ibmvfc_gather_partition_info(struct ibmvfc_host *vhost) { struct device_node *rootdn; const char *name; const unsigned int *num; rootdn = of_find_node_by_path("/"); if (!rootdn) return; name = of_get_property(rootdn, "ibm,partition-name", NULL); if (name) strncpy(vhost->partition_name, name, sizeof(vhost->partition_name)); num = of_get_property(rootdn, "ibm,partition-no", NULL); if (num) vhost->partition_number = *num; of_node_put(rootdn); } /** * ibmvfc_set_login_info - Setup info for NPIV login * @vhost: ibmvfc host struct * * Return value: * none **/ static void ibmvfc_set_login_info(struct ibmvfc_host *vhost) { struct ibmvfc_npiv_login *login_info = &vhost->login_info; struct ibmvfc_queue *async_crq = &vhost->async_crq; struct device_node *of_node = vhost->dev->of_node; const char *location; u16 max_cmds; max_cmds = scsi_qdepth + IBMVFC_NUM_INTERNAL_REQ; if (mq_enabled) max_cmds += (scsi_qdepth + IBMVFC_NUM_INTERNAL_SUBQ_REQ) * vhost->scsi_scrqs.desired_queues; memset(login_info, 0, sizeof(*login_info)); login_info->ostype = cpu_to_be32(IBMVFC_OS_LINUX); login_info->max_dma_len = cpu_to_be64(IBMVFC_MAX_SECTORS << 9); login_info->max_payload = cpu_to_be32(sizeof(struct ibmvfc_fcp_cmd_iu)); login_info->max_response = cpu_to_be32(sizeof(struct ibmvfc_fcp_rsp)); login_info->partition_num = cpu_to_be32(vhost->partition_number); login_info->vfc_frame_version = cpu_to_be32(1); login_info->fcp_version = cpu_to_be16(3); login_info->flags = cpu_to_be16(IBMVFC_FLUSH_ON_HALT); if (vhost->client_migrated) login_info->flags |= cpu_to_be16(IBMVFC_CLIENT_MIGRATED); login_info->max_cmds = cpu_to_be32(max_cmds); login_info->capabilities = cpu_to_be64(IBMVFC_CAN_MIGRATE | IBMVFC_CAN_SEND_VF_WWPN); if (vhost->mq_enabled || vhost->using_channels) login_info->capabilities |= cpu_to_be64(IBMVFC_CAN_USE_CHANNELS); login_info->async.va = cpu_to_be64(vhost->async_crq.msg_token); login_info->async.len = cpu_to_be32(async_crq->size * sizeof(*async_crq->msgs.async)); strncpy(login_info->partition_name, vhost->partition_name, IBMVFC_MAX_NAME); strncpy(login_info->device_name, dev_name(&vhost->host->shost_gendev), IBMVFC_MAX_NAME); location = of_get_property(of_node, "ibm,loc-code", NULL); location = location ? location : dev_name(vhost->dev); strncpy(login_info->drc_name, location, IBMVFC_MAX_NAME); } /** * __ibmvfc_get_event - Gets the next free event in pool * @queue: ibmvfc queue struct * @reserved: event is for a reserved management command * * Returns a free event from the pool. **/ static struct ibmvfc_event *__ibmvfc_get_event(struct ibmvfc_queue *queue, int reserved) { struct ibmvfc_event *evt = NULL; unsigned long flags; spin_lock_irqsave(&queue->l_lock, flags); if (reserved && queue->reserved_free) { evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); evt->reserved = 1; queue->reserved_free--; } else if (queue->evt_free) { evt = list_entry(queue->free.next, struct ibmvfc_event, queue_list); queue->evt_free--; } else { goto out; } atomic_set(&evt->free, 0); list_del(&evt->queue_list); out: spin_unlock_irqrestore(&queue->l_lock, flags); return evt; } #define ibmvfc_get_event(queue) __ibmvfc_get_event(queue, 0) #define ibmvfc_get_reserved_event(queue) __ibmvfc_get_event(queue, 1) /** * ibmvfc_locked_done - Calls evt completion with host_lock held * @evt: ibmvfc evt to complete * * All non-scsi command completion callbacks have the expectation that the * host_lock is held. This callback is used by ibmvfc_init_event to wrap a * MAD evt with the host_lock. **/ static void ibmvfc_locked_done(struct ibmvfc_event *evt) { unsigned long flags; spin_lock_irqsave(evt->vhost->host->host_lock, flags); evt->_done(evt); spin_unlock_irqrestore(evt->vhost->host->host_lock, flags); } /** * ibmvfc_init_event - Initialize fields in an event struct that are always * required. * @evt: The event * @done: Routine to call when the event is responded to * @format: SRP or MAD format **/ static void ibmvfc_init_event(struct ibmvfc_event *evt, void (*done) (struct ibmvfc_event *), u8 format) { evt->cmnd = NULL; evt->sync_iu = NULL; evt->eh_comp = NULL; evt->crq.format = format; if (format == IBMVFC_CMD_FORMAT) evt->done = done; else { evt->_done = done; evt->done = ibmvfc_locked_done; } evt->hwq = 0; } /** * ibmvfc_map_sg_list - Initialize scatterlist * @scmd: scsi command struct * @nseg: number of scatterlist segments * @md: memory descriptor list to initialize **/ static void ibmvfc_map_sg_list(struct scsi_cmnd *scmd, int nseg, struct srp_direct_buf *md) { int i; struct scatterlist *sg; scsi_for_each_sg(scmd, sg, nseg, i) { md[i].va = cpu_to_be64(sg_dma_address(sg)); md[i].len = cpu_to_be32(sg_dma_len(sg)); md[i].key = 0; } } /** * ibmvfc_map_sg_data - Maps dma for a scatterlist and initializes descriptor fields * @scmd: struct scsi_cmnd with the scatterlist * @evt: ibmvfc event struct * @vfc_cmd: vfc_cmd that contains the memory descriptor * @dev: device for which to map dma memory * * Returns: * 0 on success / non-zero on failure **/ static int ibmvfc_map_sg_data(struct scsi_cmnd *scmd, struct ibmvfc_event *evt, struct ibmvfc_cmd *vfc_cmd, struct device *dev) { int sg_mapped; struct srp_direct_buf *data = &vfc_cmd->ioba; struct ibmvfc_host *vhost = dev_get_drvdata(dev); struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(evt->vhost, vfc_cmd); if (cls3_error) vfc_cmd->flags |= cpu_to_be16(IBMVFC_CLASS_3_ERR); sg_mapped = scsi_dma_map(scmd); if (!sg_mapped) { vfc_cmd->flags |= cpu_to_be16(IBMVFC_NO_MEM_DESC); return 0; } else if (unlikely(sg_mapped < 0)) { if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) scmd_printk(KERN_ERR, scmd, "Failed to map DMA buffer for command\n"); return sg_mapped; } if (scmd->sc_data_direction == DMA_TO_DEVICE) { vfc_cmd->flags |= cpu_to_be16(IBMVFC_WRITE); iu->add_cdb_len |= IBMVFC_WRDATA; } else { vfc_cmd->flags |= cpu_to_be16(IBMVFC_READ); iu->add_cdb_len |= IBMVFC_RDDATA; } if (sg_mapped == 1) { ibmvfc_map_sg_list(scmd, sg_mapped, data); return 0; } vfc_cmd->flags |= cpu_to_be16(IBMVFC_SCATTERLIST); if (!evt->ext_list) { evt->ext_list = dma_pool_alloc(vhost->sg_pool, GFP_ATOMIC, &evt->ext_list_token); if (!evt->ext_list) { scsi_dma_unmap(scmd); if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) scmd_printk(KERN_ERR, scmd, "Can't allocate memory for scatterlist\n"); return -ENOMEM; } } ibmvfc_map_sg_list(scmd, sg_mapped, evt->ext_list); data->va = cpu_to_be64(evt->ext_list_token); data->len = cpu_to_be32(sg_mapped * sizeof(struct srp_direct_buf)); data->key = 0; return 0; } /** * ibmvfc_timeout - Internal command timeout handler * @t: struct ibmvfc_event that timed out * * Called when an internally generated command times out **/ static void ibmvfc_timeout(struct timer_list *t) { struct ibmvfc_event *evt = from_timer(evt, t, timer); struct ibmvfc_host *vhost = evt->vhost; dev_err(vhost->dev, "Command timed out (%p). Resetting connection\n", evt); ibmvfc_reset_host(vhost); } /** * ibmvfc_send_event - Transforms event to u64 array and calls send_crq() * @evt: event to be sent * @vhost: ibmvfc host struct * @timeout: timeout in seconds - 0 means do not time command * * Returns the value returned from ibmvfc_send_crq(). (Zero for success) **/ static int ibmvfc_send_event(struct ibmvfc_event *evt, struct ibmvfc_host *vhost, unsigned long timeout) { __be64 *crq_as_u64 = (__be64 *) &evt->crq; unsigned long flags; int rc; /* Copy the IU into the transfer area */ *evt->xfer_iu = evt->iu; if (evt->crq.format == IBMVFC_CMD_FORMAT) evt->xfer_iu->cmd.tag = cpu_to_be64((u64)evt); else if (evt->crq.format == IBMVFC_MAD_FORMAT) evt->xfer_iu->mad_common.tag = cpu_to_be64((u64)evt); else BUG(); timer_setup(&evt->timer, ibmvfc_timeout, 0); if (timeout) { evt->timer.expires = jiffies + (timeout * HZ); add_timer(&evt->timer); } spin_lock_irqsave(&evt->queue->l_lock, flags); list_add_tail(&evt->queue_list, &evt->queue->sent); atomic_set(&evt->active, 1); mb(); if (evt->queue->fmt == IBMVFC_SUB_CRQ_FMT) rc = ibmvfc_send_sub_crq(vhost, evt->queue->vios_cookie, be64_to_cpu(crq_as_u64[0]), be64_to_cpu(crq_as_u64[1]), 0, 0); else rc = ibmvfc_send_crq(vhost, be64_to_cpu(crq_as_u64[0]), be64_to_cpu(crq_as_u64[1])); if (rc) { atomic_set(&evt->active, 0); list_del(&evt->queue_list); spin_unlock_irqrestore(&evt->queue->l_lock, flags); del_timer(&evt->timer); /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. * Firmware will send a CRQ with a transport event (0xFF) to * tell this client what has happened to the transport. This * will be handled in ibmvfc_handle_crq() */ if (rc == H_CLOSED) { if (printk_ratelimit()) dev_warn(vhost->dev, "Send warning. Receive queue closed, will retry.\n"); if (evt->cmnd) scsi_dma_unmap(evt->cmnd); ibmvfc_free_event(evt); return SCSI_MLQUEUE_HOST_BUSY; } dev_err(vhost->dev, "Send error (rc=%d)\n", rc); if (evt->cmnd) { evt->cmnd->result = DID_ERROR << 16; evt->done = ibmvfc_scsi_eh_done; } else evt->xfer_iu->mad_common.status = cpu_to_be16(IBMVFC_MAD_CRQ_ERROR); evt->done(evt); } else { spin_unlock_irqrestore(&evt->queue->l_lock, flags); ibmvfc_trc_start(evt); } return 0; } /** * ibmvfc_log_error - Log an error for the failed command if appropriate * @evt: ibmvfc event to log * **/ static void ibmvfc_log_error(struct ibmvfc_event *evt) { struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); struct scsi_cmnd *cmnd = evt->cmnd; const char *err = unknown_error; int index = ibmvfc_get_err_index(be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error)); int logerr = 0; int rsp_code = 0; if (index >= 0) { logerr = cmd_status[index].log; err = cmd_status[index].name; } if (!logerr && (vhost->log_level <= (IBMVFC_DEFAULT_LOG_LEVEL + 1))) return; if (rsp->flags & FCP_RSP_LEN_VALID) rsp_code = rsp->data.info.rsp_code; scmd_printk(KERN_ERR, cmnd, "Command (%02X) : %s (%x:%x) " "flags: %x fcp_rsp: %x, resid=%d, scsi_status: %x\n", cmnd->cmnd[0], err, be16_to_cpu(vfc_cmd->status), be16_to_cpu(vfc_cmd->error), rsp->flags, rsp_code, scsi_get_resid(cmnd), rsp->scsi_status); } /** * ibmvfc_relogin - Log back into the specified device * @sdev: scsi device struct * **/ static void ibmvfc_relogin(struct scsi_device *sdev) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); struct ibmvfc_target *tgt; unsigned long flags; spin_lock_irqsave(vhost->host->host_lock, flags); list_for_each_entry(tgt, &vhost->targets, queue) { if (rport == tgt->rport) { ibmvfc_del_tgt(tgt); break; } } ibmvfc_reinit_host(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); } /** * ibmvfc_scsi_done - Handle responses from commands * @evt: ibmvfc event to be handled * * Used as a callback when sending scsi cmds. **/ static void ibmvfc_scsi_done(struct ibmvfc_event *evt) { struct ibmvfc_cmd *vfc_cmd = &evt->xfer_iu->cmd; struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(evt->vhost, vfc_cmd); struct scsi_cmnd *cmnd = evt->cmnd; u32 rsp_len = 0; u32 sense_len = be32_to_cpu(rsp->fcp_sense_len); if (cmnd) { if (be16_to_cpu(vfc_cmd->response_flags) & IBMVFC_ADAPTER_RESID_VALID) scsi_set_resid(cmnd, be32_to_cpu(vfc_cmd->adapter_resid)); else if (rsp->flags & FCP_RESID_UNDER) scsi_set_resid(cmnd, be32_to_cpu(rsp->fcp_resid)); else scsi_set_resid(cmnd, 0); if (vfc_cmd->status) { cmnd->result = ibmvfc_get_err_result(evt->vhost, vfc_cmd); if (rsp->flags & FCP_RSP_LEN_VALID) rsp_len = be32_to_cpu(rsp->fcp_rsp_len); if ((sense_len + rsp_len) > SCSI_SENSE_BUFFERSIZE) sense_len = SCSI_SENSE_BUFFERSIZE - rsp_len; if ((rsp->flags & FCP_SNS_LEN_VALID) && rsp->fcp_sense_len && rsp_len <= 8) memcpy(cmnd->sense_buffer, rsp->data.sense + rsp_len, sense_len); if ((be16_to_cpu(vfc_cmd->status) & IBMVFC_VIOS_FAILURE) && (be16_to_cpu(vfc_cmd->error) == IBMVFC_PLOGI_REQUIRED)) ibmvfc_relogin(cmnd->device); if (!cmnd->result && (!scsi_get_resid(cmnd) || (rsp->flags & FCP_RESID_OVER))) cmnd->result = (DID_ERROR << 16); ibmvfc_log_error(evt); } if (!cmnd->result && (scsi_bufflen(cmnd) - scsi_get_resid(cmnd) < cmnd->underflow)) cmnd->result = (DID_ERROR << 16); scsi_dma_unmap(cmnd); scsi_done(cmnd); } ibmvfc_free_event(evt); } /** * ibmvfc_host_chkready - Check if the host can accept commands * @vhost: struct ibmvfc host * * Returns: * 1 if host can accept command / 0 if not **/ static inline int ibmvfc_host_chkready(struct ibmvfc_host *vhost) { int result = 0; switch (vhost->state) { case IBMVFC_LINK_DEAD: case IBMVFC_HOST_OFFLINE: result = DID_NO_CONNECT << 16; break; case IBMVFC_NO_CRQ: case IBMVFC_INITIALIZING: case IBMVFC_HALTED: case IBMVFC_LINK_DOWN: result = DID_REQUEUE << 16; break; case IBMVFC_ACTIVE: result = 0; break; } return result; } static struct ibmvfc_cmd *ibmvfc_init_vfc_cmd(struct ibmvfc_event *evt, struct scsi_device *sdev) { struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_cmd *vfc_cmd = &evt->iu.cmd; struct ibmvfc_fcp_cmd_iu *iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); struct ibmvfc_fcp_rsp *rsp = ibmvfc_get_fcp_rsp(vhost, vfc_cmd); size_t offset; memset(vfc_cmd, 0, sizeof(*vfc_cmd)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { offset = offsetof(struct ibmvfc_cmd, v2.rsp); vfc_cmd->target_wwpn = cpu_to_be64(rport->port_name); } else offset = offsetof(struct ibmvfc_cmd, v1.rsp); vfc_cmd->resp.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offset); vfc_cmd->resp.len = cpu_to_be32(sizeof(*rsp)); vfc_cmd->frame_type = cpu_to_be32(IBMVFC_SCSI_FCP_TYPE); vfc_cmd->payload_len = cpu_to_be32(sizeof(*iu)); vfc_cmd->resp_len = cpu_to_be32(sizeof(*rsp)); vfc_cmd->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); vfc_cmd->tgt_scsi_id = cpu_to_be64(rport->port_id); int_to_scsilun(sdev->lun, &iu->lun); return vfc_cmd; } /** * ibmvfc_queuecommand - The queuecommand function of the scsi template * @shost: scsi host struct * @cmnd: struct scsi_cmnd to be executed * * Returns: * 0 on success / other on failure **/ static int ibmvfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd) { struct ibmvfc_host *vhost = shost_priv(shost); struct fc_rport *rport = starget_to_rport(scsi_target(cmnd->device)); struct ibmvfc_cmd *vfc_cmd; struct ibmvfc_fcp_cmd_iu *iu; struct ibmvfc_event *evt; u32 tag_and_hwq = blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); u16 hwq = blk_mq_unique_tag_to_hwq(tag_and_hwq); u16 scsi_channel; int rc; if (unlikely((rc = fc_remote_port_chkready(rport))) || unlikely((rc = ibmvfc_host_chkready(vhost)))) { cmnd->result = rc; scsi_done(cmnd); return 0; } cmnd->result = (DID_OK << 16); if (vhost->using_channels) { scsi_channel = hwq % vhost->scsi_scrqs.active_queues; evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[scsi_channel]); if (!evt) return SCSI_MLQUEUE_HOST_BUSY; evt->hwq = hwq % vhost->scsi_scrqs.active_queues; } else { evt = ibmvfc_get_event(&vhost->crq); if (!evt) return SCSI_MLQUEUE_HOST_BUSY; } ibmvfc_init_event(evt, ibmvfc_scsi_done, IBMVFC_CMD_FORMAT); evt->cmnd = cmnd; vfc_cmd = ibmvfc_init_vfc_cmd(evt, cmnd->device); iu = ibmvfc_get_fcp_iu(vhost, vfc_cmd); iu->xfer_len = cpu_to_be32(scsi_bufflen(cmnd)); memcpy(iu->cdb, cmnd->cmnd, cmnd->cmd_len); if (cmnd->flags & SCMD_TAGGED) { vfc_cmd->task_tag = cpu_to_be64(scsi_cmd_to_rq(cmnd)->tag); iu->pri_task_attr = IBMVFC_SIMPLE_TASK; } vfc_cmd->correlation = cpu_to_be64((u64)evt); if (likely(!(rc = ibmvfc_map_sg_data(cmnd, evt, vfc_cmd, vhost->dev)))) return ibmvfc_send_event(evt, vhost, 0); ibmvfc_free_event(evt); if (rc == -ENOMEM) return SCSI_MLQUEUE_HOST_BUSY; if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) scmd_printk(KERN_ERR, cmnd, "Failed to map DMA buffer for command. rc=%d\n", rc); cmnd->result = DID_ERROR << 16; scsi_done(cmnd); return 0; } /** * ibmvfc_sync_completion - Signal that a synchronous command has completed * @evt: ibmvfc event struct * **/ static void ibmvfc_sync_completion(struct ibmvfc_event *evt) { /* copy the response back */ if (evt->sync_iu) *evt->sync_iu = *evt->xfer_iu; complete(&evt->comp); } /** * ibmvfc_bsg_timeout_done - Completion handler for cancelling BSG commands * @evt: struct ibmvfc_event * **/ static void ibmvfc_bsg_timeout_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; ibmvfc_free_event(evt); vhost->aborting_passthru = 0; dev_info(vhost->dev, "Passthru command cancelled\n"); } /** * ibmvfc_bsg_timeout - Handle a BSG timeout * @job: struct bsg_job that timed out * * Returns: * 0 on success / other on failure **/ static int ibmvfc_bsg_timeout(struct bsg_job *job) { struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); unsigned long port_id = (unsigned long)job->dd_data; struct ibmvfc_event *evt; struct ibmvfc_tmf *tmf; unsigned long flags; int rc; ENTER; spin_lock_irqsave(vhost->host->host_lock, flags); if (vhost->aborting_passthru || vhost->state != IBMVFC_ACTIVE) { __ibmvfc_reset_host(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); return 0; } vhost->aborting_passthru = 1; evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return -ENOMEM; } ibmvfc_init_event(evt, ibmvfc_bsg_timeout_done, IBMVFC_MAD_FORMAT); tmf = &evt->iu.tmf; memset(tmf, 0, sizeof(*tmf)); tmf->common.version = cpu_to_be32(1); tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); tmf->common.length = cpu_to_be16(sizeof(*tmf)); tmf->scsi_id = cpu_to_be64(port_id); tmf->cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); tmf->my_cancel_key = cpu_to_be32(IBMVFC_INTERNAL_CANCEL_KEY); rc = ibmvfc_send_event(evt, vhost, default_timeout); if (rc != 0) { vhost->aborting_passthru = 0; dev_err(vhost->dev, "Failed to send cancel event. rc=%d\n", rc); rc = -EIO; } else dev_info(vhost->dev, "Cancelling passthru command to port id 0x%lx\n", port_id); spin_unlock_irqrestore(vhost->host->host_lock, flags); LEAVE; return rc; } /** * ibmvfc_bsg_plogi - PLOGI into a target to handle a BSG command * @vhost: struct ibmvfc_host to send command * @port_id: port ID to send command * * Returns: * 0 on success / other on failure **/ static int ibmvfc_bsg_plogi(struct ibmvfc_host *vhost, unsigned int port_id) { struct ibmvfc_port_login *plogi; struct ibmvfc_target *tgt; struct ibmvfc_event *evt; union ibmvfc_iu rsp_iu; unsigned long flags; int rc = 0, issue_login = 1; ENTER; spin_lock_irqsave(vhost->host->host_lock, flags); list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->scsi_id == port_id) { issue_login = 0; break; } } if (!issue_login) goto unlock_out; if (unlikely((rc = ibmvfc_host_chkready(vhost)))) goto unlock_out; evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { rc = -ENOMEM; goto unlock_out; } ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); plogi = &evt->iu.plogi; memset(plogi, 0, sizeof(*plogi)); plogi->common.version = cpu_to_be32(1); plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); plogi->common.length = cpu_to_be16(sizeof(*plogi)); plogi->scsi_id = cpu_to_be64(port_id); evt->sync_iu = &rsp_iu; init_completion(&evt->comp); rc = ibmvfc_send_event(evt, vhost, default_timeout); spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rc) return -EIO; wait_for_completion(&evt->comp); if (rsp_iu.plogi.common.status) rc = -EIO; spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_free_event(evt); unlock_out: spin_unlock_irqrestore(vhost->host->host_lock, flags); LEAVE; return rc; } /** * ibmvfc_bsg_request - Handle a BSG request * @job: struct bsg_job to be executed * * Returns: * 0 on success / other on failure **/ static int ibmvfc_bsg_request(struct bsg_job *job) { struct ibmvfc_host *vhost = shost_priv(fc_bsg_to_shost(job)); struct fc_rport *rport = fc_bsg_to_rport(job); struct ibmvfc_passthru_mad *mad; struct ibmvfc_event *evt; union ibmvfc_iu rsp_iu; unsigned long flags, port_id = -1; struct fc_bsg_request *bsg_request = job->request; struct fc_bsg_reply *bsg_reply = job->reply; unsigned int code = bsg_request->msgcode; int rc = 0, req_seg, rsp_seg, issue_login = 0; u32 fc_flags, rsp_len; ENTER; bsg_reply->reply_payload_rcv_len = 0; if (rport) port_id = rport->port_id; switch (code) { case FC_BSG_HST_ELS_NOLOGIN: port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) | (bsg_request->rqst_data.h_els.port_id[1] << 8) | bsg_request->rqst_data.h_els.port_id[2]; fallthrough; case FC_BSG_RPT_ELS: fc_flags = IBMVFC_FC_ELS; break; case FC_BSG_HST_CT: issue_login = 1; port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) | (bsg_request->rqst_data.h_ct.port_id[1] << 8) | bsg_request->rqst_data.h_ct.port_id[2]; fallthrough; case FC_BSG_RPT_CT: fc_flags = IBMVFC_FC_CT_IU; break; default: return -ENOTSUPP; } if (port_id == -1) return -EINVAL; if (!mutex_trylock(&vhost->passthru_mutex)) return -EBUSY; job->dd_data = (void *)port_id; req_seg = dma_map_sg(vhost->dev, job->request_payload.sg_list, job->request_payload.sg_cnt, DMA_TO_DEVICE); if (!req_seg) { mutex_unlock(&vhost->passthru_mutex); return -ENOMEM; } rsp_seg = dma_map_sg(vhost->dev, job->reply_payload.sg_list, job->reply_payload.sg_cnt, DMA_FROM_DEVICE); if (!rsp_seg) { dma_unmap_sg(vhost->dev, job->request_payload.sg_list, job->request_payload.sg_cnt, DMA_TO_DEVICE); mutex_unlock(&vhost->passthru_mutex); return -ENOMEM; } if (req_seg > 1 || rsp_seg > 1) { rc = -EINVAL; goto out; } if (issue_login) rc = ibmvfc_bsg_plogi(vhost, port_id); spin_lock_irqsave(vhost->host->host_lock, flags); if (unlikely(rc || (rport && (rc = fc_remote_port_chkready(rport)))) || unlikely((rc = ibmvfc_host_chkready(vhost)))) { spin_unlock_irqrestore(vhost->host->host_lock, flags); goto out; } evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { spin_unlock_irqrestore(vhost->host->host_lock, flags); rc = -ENOMEM; goto out; } ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); mad = &evt->iu.passthru; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); mad->cmd_ioba.va = cpu_to_be64(be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_passthru_mad, iu)); mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); mad->iu.cmd_len = cpu_to_be32(job->request_payload.payload_len); mad->iu.rsp_len = cpu_to_be32(job->reply_payload.payload_len); mad->iu.flags = cpu_to_be32(fc_flags); mad->iu.cancel_key = cpu_to_be32(IBMVFC_PASSTHRU_CANCEL_KEY); mad->iu.cmd.va = cpu_to_be64(sg_dma_address(job->request_payload.sg_list)); mad->iu.cmd.len = cpu_to_be32(sg_dma_len(job->request_payload.sg_list)); mad->iu.rsp.va = cpu_to_be64(sg_dma_address(job->reply_payload.sg_list)); mad->iu.rsp.len = cpu_to_be32(sg_dma_len(job->reply_payload.sg_list)); mad->iu.scsi_id = cpu_to_be64(port_id); mad->iu.tag = cpu_to_be64((u64)evt); rsp_len = be32_to_cpu(mad->iu.rsp.len); evt->sync_iu = &rsp_iu; init_completion(&evt->comp); rc = ibmvfc_send_event(evt, vhost, 0); spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rc) { rc = -EIO; goto out; } wait_for_completion(&evt->comp); if (rsp_iu.passthru.common.status) rc = -EIO; else bsg_reply->reply_payload_rcv_len = rsp_len; spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_free_event(evt); spin_unlock_irqrestore(vhost->host->host_lock, flags); bsg_reply->result = rc; bsg_job_done(job, bsg_reply->result, bsg_reply->reply_payload_rcv_len); rc = 0; out: dma_unmap_sg(vhost->dev, job->request_payload.sg_list, job->request_payload.sg_cnt, DMA_TO_DEVICE); dma_unmap_sg(vhost->dev, job->reply_payload.sg_list, job->reply_payload.sg_cnt, DMA_FROM_DEVICE); mutex_unlock(&vhost->passthru_mutex); LEAVE; return rc; } /** * ibmvfc_reset_device - Reset the device with the specified reset type * @sdev: scsi device to reset * @type: reset type * @desc: reset type description for log messages * * Returns: * 0 on success / other on failure **/ static int ibmvfc_reset_device(struct scsi_device *sdev, int type, char *desc) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); struct ibmvfc_cmd *tmf; struct ibmvfc_event *evt = NULL; union ibmvfc_iu rsp_iu; struct ibmvfc_fcp_cmd_iu *iu; struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); int rsp_rc = -EBUSY; unsigned long flags; int rsp_code = 0; spin_lock_irqsave(vhost->host->host_lock, flags); if (vhost->state == IBMVFC_ACTIVE) { if (vhost->using_channels) evt = ibmvfc_get_event(&vhost->scsi_scrqs.scrqs[0]); else evt = ibmvfc_get_event(&vhost->crq); if (!evt) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return -ENOMEM; } ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); tmf = ibmvfc_init_vfc_cmd(evt, sdev); iu = ibmvfc_get_fcp_iu(vhost, tmf); tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) tmf->target_wwpn = cpu_to_be64(rport->port_name); iu->tmf_flags = type; evt->sync_iu = &rsp_iu; init_completion(&evt->comp); rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rsp_rc != 0) { sdev_printk(KERN_ERR, sdev, "Failed to send %s reset event. rc=%d\n", desc, rsp_rc); return -EIO; } sdev_printk(KERN_INFO, sdev, "Resetting %s\n", desc); wait_for_completion(&evt->comp); if (rsp_iu.cmd.status) rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); if (rsp_code) { if (fc_rsp->flags & FCP_RSP_LEN_VALID) rsp_code = fc_rsp->data.info.rsp_code; sdev_printk(KERN_ERR, sdev, "%s reset failed: %s (%x:%x) " "flags: %x fcp_rsp: %x, scsi_status: %x\n", desc, ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, fc_rsp->scsi_status); rsp_rc = -EIO; } else sdev_printk(KERN_INFO, sdev, "%s reset successful\n", desc); spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_free_event(evt); spin_unlock_irqrestore(vhost->host->host_lock, flags); return rsp_rc; } /** * ibmvfc_match_rport - Match function for specified remote port * @evt: ibmvfc event struct * @rport: device to match * * Returns: * 1 if event matches rport / 0 if event does not match rport **/ static int ibmvfc_match_rport(struct ibmvfc_event *evt, void *rport) { struct fc_rport *cmd_rport; if (evt->cmnd) { cmd_rport = starget_to_rport(scsi_target(evt->cmnd->device)); if (cmd_rport == rport) return 1; } return 0; } /** * ibmvfc_match_target - Match function for specified target * @evt: ibmvfc event struct * @device: device to match (starget) * * Returns: * 1 if event matches starget / 0 if event does not match starget **/ static int ibmvfc_match_target(struct ibmvfc_event *evt, void *device) { if (evt->cmnd && scsi_target(evt->cmnd->device) == device) return 1; return 0; } /** * ibmvfc_match_lun - Match function for specified LUN * @evt: ibmvfc event struct * @device: device to match (sdev) * * Returns: * 1 if event matches sdev / 0 if event does not match sdev **/ static int ibmvfc_match_lun(struct ibmvfc_event *evt, void *device) { if (evt->cmnd && evt->cmnd->device == device) return 1; return 0; } /** * ibmvfc_event_is_free - Check if event is free or not * @evt: ibmvfc event struct * * Returns: * true / false **/ static bool ibmvfc_event_is_free(struct ibmvfc_event *evt) { struct ibmvfc_event *loop_evt; list_for_each_entry(loop_evt, &evt->queue->free, queue_list) if (loop_evt == evt) return true; return false; } /** * ibmvfc_wait_for_ops - Wait for ops to complete * @vhost: ibmvfc host struct * @device: device to match (starget or sdev) * @match: match function * * Returns: * SUCCESS / FAILED **/ static int ibmvfc_wait_for_ops(struct ibmvfc_host *vhost, void *device, int (*match) (struct ibmvfc_event *, void *)) { struct ibmvfc_event *evt; DECLARE_COMPLETION_ONSTACK(comp); int wait, i, q_index, q_size; unsigned long flags; signed long timeout = IBMVFC_ABORT_WAIT_TIMEOUT * HZ; struct ibmvfc_queue *queues; ENTER; if (vhost->mq_enabled && vhost->using_channels) { queues = vhost->scsi_scrqs.scrqs; q_size = vhost->scsi_scrqs.active_queues; } else { queues = &vhost->crq; q_size = 1; } do { wait = 0; spin_lock_irqsave(vhost->host->host_lock, flags); for (q_index = 0; q_index < q_size; q_index++) { spin_lock(&queues[q_index].l_lock); for (i = 0; i < queues[q_index].evt_pool.size; i++) { evt = &queues[q_index].evt_pool.events[i]; if (!ibmvfc_event_is_free(evt)) { if (match(evt, device)) { evt->eh_comp = ∁ wait++; } } } spin_unlock(&queues[q_index].l_lock); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (wait) { timeout = wait_for_completion_timeout(&comp, timeout); if (!timeout) { wait = 0; spin_lock_irqsave(vhost->host->host_lock, flags); for (q_index = 0; q_index < q_size; q_index++) { spin_lock(&queues[q_index].l_lock); for (i = 0; i < queues[q_index].evt_pool.size; i++) { evt = &queues[q_index].evt_pool.events[i]; if (!ibmvfc_event_is_free(evt)) { if (match(evt, device)) { evt->eh_comp = NULL; wait++; } } } spin_unlock(&queues[q_index].l_lock); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (wait) dev_err(vhost->dev, "Timed out waiting for aborted commands\n"); LEAVE; return wait ? FAILED : SUCCESS; } } } while (wait); LEAVE; return SUCCESS; } static struct ibmvfc_event *ibmvfc_init_tmf(struct ibmvfc_queue *queue, struct scsi_device *sdev, int type) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct scsi_target *starget = scsi_target(sdev); struct fc_rport *rport = starget_to_rport(starget); struct ibmvfc_event *evt; struct ibmvfc_tmf *tmf; evt = ibmvfc_get_reserved_event(queue); if (!evt) return NULL; ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_MAD_FORMAT); tmf = &evt->iu.tmf; memset(tmf, 0, sizeof(*tmf)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { tmf->common.version = cpu_to_be32(2); tmf->target_wwpn = cpu_to_be64(rport->port_name); } else { tmf->common.version = cpu_to_be32(1); } tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); tmf->common.length = cpu_to_be16(sizeof(*tmf)); tmf->scsi_id = cpu_to_be64(rport->port_id); int_to_scsilun(sdev->lun, &tmf->lun); if (!ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPRESS_ABTS)) type &= ~IBMVFC_TMF_SUPPRESS_ABTS; if (vhost->state == IBMVFC_ACTIVE) tmf->flags = cpu_to_be32((type | IBMVFC_TMF_LUA_VALID)); else tmf->flags = cpu_to_be32(((type & IBMVFC_TMF_SUPPRESS_ABTS) | IBMVFC_TMF_LUA_VALID)); tmf->cancel_key = cpu_to_be32((unsigned long)sdev->hostdata); tmf->my_cancel_key = cpu_to_be32((unsigned long)starget->hostdata); init_completion(&evt->comp); return evt; } static int ibmvfc_cancel_all_mq(struct scsi_device *sdev, int type) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct ibmvfc_event *evt, *found_evt, *temp; struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; unsigned long flags; int num_hwq, i; int fail = 0; LIST_HEAD(cancelq); u16 status; ENTER; spin_lock_irqsave(vhost->host->host_lock, flags); num_hwq = vhost->scsi_scrqs.active_queues; for (i = 0; i < num_hwq; i++) { spin_lock(queues[i].q_lock); spin_lock(&queues[i].l_lock); found_evt = NULL; list_for_each_entry(evt, &queues[i].sent, queue_list) { if (evt->cmnd && evt->cmnd->device == sdev) { found_evt = evt; break; } } spin_unlock(&queues[i].l_lock); if (found_evt && vhost->logged_in) { evt = ibmvfc_init_tmf(&queues[i], sdev, type); if (!evt) { spin_unlock(queues[i].q_lock); spin_unlock_irqrestore(vhost->host->host_lock, flags); return -ENOMEM; } evt->sync_iu = &queues[i].cancel_rsp; ibmvfc_send_event(evt, vhost, default_timeout); list_add_tail(&evt->cancel, &cancelq); } spin_unlock(queues[i].q_lock); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (list_empty(&cancelq)) { if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); return 0; } sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); list_for_each_entry_safe(evt, temp, &cancelq, cancel) { wait_for_completion(&evt->comp); status = be16_to_cpu(evt->queue->cancel_rsp.mad_common.status); list_del(&evt->cancel); ibmvfc_free_event(evt); if (status != IBMVFC_MAD_SUCCESS) { sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); switch (status) { case IBMVFC_MAD_DRIVER_FAILED: case IBMVFC_MAD_CRQ_ERROR: /* Host adapter most likely going through reset, return success to * the caller will wait for the command being cancelled to get returned */ break; default: fail = 1; break; } } } if (fail) return -EIO; sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); LEAVE; return 0; } static int ibmvfc_cancel_all_sq(struct scsi_device *sdev, int type) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct ibmvfc_event *evt, *found_evt; union ibmvfc_iu rsp; int rsp_rc = -EBUSY; unsigned long flags; u16 status; ENTER; found_evt = NULL; spin_lock_irqsave(vhost->host->host_lock, flags); spin_lock(&vhost->crq.l_lock); list_for_each_entry(evt, &vhost->crq.sent, queue_list) { if (evt->cmnd && evt->cmnd->device == sdev) { found_evt = evt; break; } } spin_unlock(&vhost->crq.l_lock); if (!found_evt) { if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) sdev_printk(KERN_INFO, sdev, "No events found to cancel\n"); spin_unlock_irqrestore(vhost->host->host_lock, flags); return 0; } if (vhost->logged_in) { evt = ibmvfc_init_tmf(&vhost->crq, sdev, type); evt->sync_iu = &rsp; rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rsp_rc != 0) { sdev_printk(KERN_ERR, sdev, "Failed to send cancel event. rc=%d\n", rsp_rc); /* If failure is received, the host adapter is most likely going through reset, return success so the caller will wait for the command being cancelled to get returned */ return 0; } sdev_printk(KERN_INFO, sdev, "Cancelling outstanding commands.\n"); wait_for_completion(&evt->comp); status = be16_to_cpu(rsp.mad_common.status); spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_free_event(evt); spin_unlock_irqrestore(vhost->host->host_lock, flags); if (status != IBMVFC_MAD_SUCCESS) { sdev_printk(KERN_WARNING, sdev, "Cancel failed with rc=%x\n", status); switch (status) { case IBMVFC_MAD_DRIVER_FAILED: case IBMVFC_MAD_CRQ_ERROR: /* Host adapter most likely going through reset, return success to the caller will wait for the command being cancelled to get returned */ return 0; default: return -EIO; }; } sdev_printk(KERN_INFO, sdev, "Successfully cancelled outstanding commands\n"); return 0; } /** * ibmvfc_cancel_all - Cancel all outstanding commands to the device * @sdev: scsi device to cancel commands * @type: type of error recovery being performed * * This sends a cancel to the VIOS for the specified device. This does * NOT send any abort to the actual device. That must be done separately. * * Returns: * 0 on success / other on failure **/ static int ibmvfc_cancel_all(struct scsi_device *sdev, int type) { struct ibmvfc_host *vhost = shost_priv(sdev->host); if (vhost->mq_enabled && vhost->using_channels) return ibmvfc_cancel_all_mq(sdev, type); else return ibmvfc_cancel_all_sq(sdev, type); } /** * ibmvfc_match_key - Match function for specified cancel key * @evt: ibmvfc event struct * @key: cancel key to match * * Returns: * 1 if event matches key / 0 if event does not match key **/ static int ibmvfc_match_key(struct ibmvfc_event *evt, void *key) { unsigned long cancel_key = (unsigned long)key; if (evt->crq.format == IBMVFC_CMD_FORMAT && be32_to_cpu(evt->iu.cmd.cancel_key) == cancel_key) return 1; return 0; } /** * ibmvfc_match_evt - Match function for specified event * @evt: ibmvfc event struct * @match: event to match * * Returns: * 1 if event matches key / 0 if event does not match key **/ static int ibmvfc_match_evt(struct ibmvfc_event *evt, void *match) { if (evt == match) return 1; return 0; } /** * ibmvfc_abort_task_set - Abort outstanding commands to the device * @sdev: scsi device to abort commands * * This sends an Abort Task Set to the VIOS for the specified device. This does * NOT send any cancel to the VIOS. That must be done separately. * * Returns: * 0 on success / other on failure **/ static int ibmvfc_abort_task_set(struct scsi_device *sdev) { struct ibmvfc_host *vhost = shost_priv(sdev->host); struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); struct ibmvfc_cmd *tmf; struct ibmvfc_event *evt, *found_evt; union ibmvfc_iu rsp_iu; struct ibmvfc_fcp_cmd_iu *iu; struct ibmvfc_fcp_rsp *fc_rsp = ibmvfc_get_fcp_rsp(vhost, &rsp_iu.cmd); int rc, rsp_rc = -EBUSY; unsigned long flags, timeout = IBMVFC_ABORT_TIMEOUT; int rsp_code = 0; found_evt = NULL; spin_lock_irqsave(vhost->host->host_lock, flags); spin_lock(&vhost->crq.l_lock); list_for_each_entry(evt, &vhost->crq.sent, queue_list) { if (evt->cmnd && evt->cmnd->device == sdev) { found_evt = evt; break; } } spin_unlock(&vhost->crq.l_lock); if (!found_evt) { if (vhost->log_level > IBMVFC_DEFAULT_LOG_LEVEL) sdev_printk(KERN_INFO, sdev, "No events found to abort\n"); spin_unlock_irqrestore(vhost->host->host_lock, flags); return 0; } if (vhost->state == IBMVFC_ACTIVE) { evt = ibmvfc_get_event(&vhost->crq); if (!evt) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return -ENOMEM; } ibmvfc_init_event(evt, ibmvfc_sync_completion, IBMVFC_CMD_FORMAT); tmf = ibmvfc_init_vfc_cmd(evt, sdev); iu = ibmvfc_get_fcp_iu(vhost, tmf); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) tmf->target_wwpn = cpu_to_be64(rport->port_name); iu->tmf_flags = IBMVFC_ABORT_TASK_SET; tmf->flags = cpu_to_be16((IBMVFC_NO_MEM_DESC | IBMVFC_TMF)); evt->sync_iu = &rsp_iu; tmf->correlation = cpu_to_be64((u64)evt); init_completion(&evt->comp); rsp_rc = ibmvfc_send_event(evt, vhost, default_timeout); } spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rsp_rc != 0) { sdev_printk(KERN_ERR, sdev, "Failed to send abort. rc=%d\n", rsp_rc); return -EIO; } sdev_printk(KERN_INFO, sdev, "Aborting outstanding commands\n"); timeout = wait_for_completion_timeout(&evt->comp, timeout); if (!timeout) { rc = ibmvfc_cancel_all(sdev, 0); if (!rc) { rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); if (rc == SUCCESS) rc = 0; } if (rc) { sdev_printk(KERN_INFO, sdev, "Cancel failed, resetting host\n"); ibmvfc_reset_host(vhost); rsp_rc = -EIO; rc = ibmvfc_wait_for_ops(vhost, sdev->hostdata, ibmvfc_match_key); if (rc == SUCCESS) rsp_rc = 0; rc = ibmvfc_wait_for_ops(vhost, evt, ibmvfc_match_evt); if (rc != SUCCESS) { spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_hard_reset_host(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); rsp_rc = 0; } goto out; } } if (rsp_iu.cmd.status) rsp_code = ibmvfc_get_err_result(vhost, &rsp_iu.cmd); if (rsp_code) { if (fc_rsp->flags & FCP_RSP_LEN_VALID) rsp_code = fc_rsp->data.info.rsp_code; sdev_printk(KERN_ERR, sdev, "Abort failed: %s (%x:%x) " "flags: %x fcp_rsp: %x, scsi_status: %x\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error)), be16_to_cpu(rsp_iu.cmd.status), be16_to_cpu(rsp_iu.cmd.error), fc_rsp->flags, rsp_code, fc_rsp->scsi_status); rsp_rc = -EIO; } else sdev_printk(KERN_INFO, sdev, "Abort successful\n"); out: spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_free_event(evt); spin_unlock_irqrestore(vhost->host->host_lock, flags); return rsp_rc; } /** * ibmvfc_eh_abort_handler - Abort a command * @cmd: scsi command to abort * * Returns: * SUCCESS / FAST_IO_FAIL / FAILED **/ static int ibmvfc_eh_abort_handler(struct scsi_cmnd *cmd) { struct scsi_device *sdev = cmd->device; struct ibmvfc_host *vhost = shost_priv(sdev->host); int cancel_rc, block_rc; int rc = FAILED; ENTER; block_rc = fc_block_scsi_eh(cmd); ibmvfc_wait_while_resetting(vhost); if (block_rc != FAST_IO_FAIL) { cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_ABORT_TASK_SET); ibmvfc_abort_task_set(sdev); } else cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); if (!cancel_rc) rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); if (block_rc == FAST_IO_FAIL && rc != FAILED) rc = FAST_IO_FAIL; LEAVE; return rc; } /** * ibmvfc_eh_device_reset_handler - Reset a single LUN * @cmd: scsi command struct * * Returns: * SUCCESS / FAST_IO_FAIL / FAILED **/ static int ibmvfc_eh_device_reset_handler(struct scsi_cmnd *cmd) { struct scsi_device *sdev = cmd->device; struct ibmvfc_host *vhost = shost_priv(sdev->host); int cancel_rc, block_rc, reset_rc = 0; int rc = FAILED; ENTER; block_rc = fc_block_scsi_eh(cmd); ibmvfc_wait_while_resetting(vhost); if (block_rc != FAST_IO_FAIL) { cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_LUN_RESET); reset_rc = ibmvfc_reset_device(sdev, IBMVFC_LUN_RESET, "LUN"); } else cancel_rc = ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); if (!cancel_rc && !reset_rc) rc = ibmvfc_wait_for_ops(vhost, sdev, ibmvfc_match_lun); if (block_rc == FAST_IO_FAIL && rc != FAILED) rc = FAST_IO_FAIL; LEAVE; return rc; } /** * ibmvfc_dev_cancel_all_noreset - Device iterated cancel all function * @sdev: scsi device struct * @data: return code * **/ static void ibmvfc_dev_cancel_all_noreset(struct scsi_device *sdev, void *data) { unsigned long *rc = data; *rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); } /** * ibmvfc_eh_target_reset_handler - Reset the target * @cmd: scsi command struct * * Returns: * SUCCESS / FAST_IO_FAIL / FAILED **/ static int ibmvfc_eh_target_reset_handler(struct scsi_cmnd *cmd) { struct scsi_target *starget = scsi_target(cmd->device); struct fc_rport *rport = starget_to_rport(starget); struct Scsi_Host *shost = rport_to_shost(rport); struct ibmvfc_host *vhost = shost_priv(shost); int block_rc; int reset_rc = 0; int rc = FAILED; unsigned long cancel_rc = 0; bool tgt_reset = false; ENTER; block_rc = fc_block_rport(rport); ibmvfc_wait_while_resetting(vhost); if (block_rc != FAST_IO_FAIL) { struct scsi_device *sdev; shost_for_each_device(sdev, shost) { if ((sdev->channel != starget->channel) || (sdev->id != starget->id)) continue; cancel_rc |= ibmvfc_cancel_all(sdev, IBMVFC_TMF_TGT_RESET); if (!tgt_reset) { reset_rc = ibmvfc_reset_device(sdev, IBMVFC_TARGET_RESET, "target"); tgt_reset = true; } } } else starget_for_each_device(starget, &cancel_rc, ibmvfc_dev_cancel_all_noreset); if (!cancel_rc && !reset_rc) rc = ibmvfc_wait_for_ops(vhost, starget, ibmvfc_match_target); if (block_rc == FAST_IO_FAIL && rc != FAILED) rc = FAST_IO_FAIL; LEAVE; return rc; } /** * ibmvfc_eh_host_reset_handler - Reset the connection to the server * @cmd: struct scsi_cmnd having problems * **/ static int ibmvfc_eh_host_reset_handler(struct scsi_cmnd *cmd) { int rc; struct ibmvfc_host *vhost = shost_priv(cmd->device->host); dev_err(vhost->dev, "Resetting connection due to error recovery\n"); rc = ibmvfc_issue_fc_host_lip(vhost->host); return rc ? FAILED : SUCCESS; } /** * ibmvfc_terminate_rport_io - Terminate all pending I/O to the rport. * @rport: rport struct * * Return value: * none **/ static void ibmvfc_terminate_rport_io(struct fc_rport *rport) { struct Scsi_Host *shost = rport_to_shost(rport); struct ibmvfc_host *vhost = shost_priv(shost); struct fc_rport *dev_rport; struct scsi_device *sdev; struct ibmvfc_target *tgt; unsigned long rc, flags; unsigned int found; ENTER; shost_for_each_device(sdev, shost) { dev_rport = starget_to_rport(scsi_target(sdev)); if (dev_rport != rport) continue; ibmvfc_cancel_all(sdev, IBMVFC_TMF_SUPPRESS_ABTS); } rc = ibmvfc_wait_for_ops(vhost, rport, ibmvfc_match_rport); if (rc == FAILED) ibmvfc_issue_fc_host_lip(shost); spin_lock_irqsave(shost->host_lock, flags); found = 0; list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->scsi_id == rport->port_id) { found++; break; } } if (found && tgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { /* * If we get here, that means we previously attempted to send * an implicit logout to the target but it failed, most likely * due to I/O being pending, so we need to send it again */ ibmvfc_del_tgt(tgt); ibmvfc_reinit_host(vhost); } spin_unlock_irqrestore(shost->host_lock, flags); LEAVE; } static const struct ibmvfc_async_desc ae_desc [] = { { "PLOGI", IBMVFC_AE_ELS_PLOGI, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, { "LOGO", IBMVFC_AE_ELS_LOGO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, { "PRLO", IBMVFC_AE_ELS_PRLO, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, { "N-Port SCN", IBMVFC_AE_SCN_NPORT, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, { "Group SCN", IBMVFC_AE_SCN_GROUP, IBMVFC_DEFAULT_LOG_LEVEL + 1 }, { "Domain SCN", IBMVFC_AE_SCN_DOMAIN, IBMVFC_DEFAULT_LOG_LEVEL }, { "Fabric SCN", IBMVFC_AE_SCN_FABRIC, IBMVFC_DEFAULT_LOG_LEVEL }, { "Link Up", IBMVFC_AE_LINK_UP, IBMVFC_DEFAULT_LOG_LEVEL }, { "Link Down", IBMVFC_AE_LINK_DOWN, IBMVFC_DEFAULT_LOG_LEVEL }, { "Link Dead", IBMVFC_AE_LINK_DEAD, IBMVFC_DEFAULT_LOG_LEVEL }, { "Halt", IBMVFC_AE_HALT, IBMVFC_DEFAULT_LOG_LEVEL }, { "Resume", IBMVFC_AE_RESUME, IBMVFC_DEFAULT_LOG_LEVEL }, { "Adapter Failed", IBMVFC_AE_ADAPTER_FAILED, IBMVFC_DEFAULT_LOG_LEVEL }, }; static const struct ibmvfc_async_desc unknown_ae = { "Unknown async", 0, IBMVFC_DEFAULT_LOG_LEVEL }; /** * ibmvfc_get_ae_desc - Get text description for async event * @ae: async event * **/ static const struct ibmvfc_async_desc *ibmvfc_get_ae_desc(u64 ae) { int i; for (i = 0; i < ARRAY_SIZE(ae_desc); i++) if (ae_desc[i].ae == ae) return &ae_desc[i]; return &unknown_ae; } static const struct { enum ibmvfc_ae_link_state state; const char *desc; } link_desc [] = { { IBMVFC_AE_LS_LINK_UP, " link up" }, { IBMVFC_AE_LS_LINK_BOUNCED, " link bounced" }, { IBMVFC_AE_LS_LINK_DOWN, " link down" }, { IBMVFC_AE_LS_LINK_DEAD, " link dead" }, }; /** * ibmvfc_get_link_state - Get text description for link state * @state: link state * **/ static const char *ibmvfc_get_link_state(enum ibmvfc_ae_link_state state) { int i; for (i = 0; i < ARRAY_SIZE(link_desc); i++) if (link_desc[i].state == state) return link_desc[i].desc; return ""; } /** * ibmvfc_handle_async - Handle an async event from the adapter * @crq: crq to process * @vhost: ibmvfc host struct * **/ static void ibmvfc_handle_async(struct ibmvfc_async_crq *crq, struct ibmvfc_host *vhost) { const struct ibmvfc_async_desc *desc = ibmvfc_get_ae_desc(be64_to_cpu(crq->event)); struct ibmvfc_target *tgt; ibmvfc_log(vhost, desc->log_level, "%s event received. scsi_id: %llx, wwpn: %llx," " node_name: %llx%s\n", desc->desc, be64_to_cpu(crq->scsi_id), be64_to_cpu(crq->wwpn), be64_to_cpu(crq->node_name), ibmvfc_get_link_state(crq->link_state)); switch (be64_to_cpu(crq->event)) { case IBMVFC_AE_RESUME: switch (crq->link_state) { case IBMVFC_AE_LS_LINK_DOWN: ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); break; case IBMVFC_AE_LS_LINK_DEAD: ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); break; case IBMVFC_AE_LS_LINK_UP: case IBMVFC_AE_LS_LINK_BOUNCED: default: vhost->events_to_log |= IBMVFC_AE_LINKUP; vhost->delay_init = 1; __ibmvfc_reset_host(vhost); break; } break; case IBMVFC_AE_LINK_UP: vhost->events_to_log |= IBMVFC_AE_LINKUP; vhost->delay_init = 1; __ibmvfc_reset_host(vhost); break; case IBMVFC_AE_SCN_FABRIC: case IBMVFC_AE_SCN_DOMAIN: vhost->events_to_log |= IBMVFC_AE_RSCN; if (vhost->state < IBMVFC_HALTED) { vhost->delay_init = 1; __ibmvfc_reset_host(vhost); } break; case IBMVFC_AE_SCN_NPORT: case IBMVFC_AE_SCN_GROUP: vhost->events_to_log |= IBMVFC_AE_RSCN; ibmvfc_reinit_host(vhost); break; case IBMVFC_AE_ELS_LOGO: case IBMVFC_AE_ELS_PRLO: case IBMVFC_AE_ELS_PLOGI: list_for_each_entry(tgt, &vhost->targets, queue) { if (!crq->scsi_id && !crq->wwpn && !crq->node_name) break; if (crq->scsi_id && cpu_to_be64(tgt->scsi_id) != crq->scsi_id) continue; if (crq->wwpn && cpu_to_be64(tgt->ids.port_name) != crq->wwpn) continue; if (crq->node_name && cpu_to_be64(tgt->ids.node_name) != crq->node_name) continue; if (tgt->need_login && be64_to_cpu(crq->event) == IBMVFC_AE_ELS_LOGO) tgt->logo_rcvd = 1; if (!tgt->need_login || be64_to_cpu(crq->event) == IBMVFC_AE_ELS_PLOGI) { ibmvfc_del_tgt(tgt); ibmvfc_reinit_host(vhost); } } break; case IBMVFC_AE_LINK_DOWN: case IBMVFC_AE_ADAPTER_FAILED: ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); break; case IBMVFC_AE_LINK_DEAD: ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); break; case IBMVFC_AE_HALT: ibmvfc_link_down(vhost, IBMVFC_HALTED); break; default: dev_err(vhost->dev, "Unknown async event received: %lld\n", crq->event); break; } } /** * ibmvfc_handle_crq - Handles and frees received events in the CRQ * @crq: Command/Response queue * @vhost: ibmvfc host struct * @evt_doneq: Event done queue * **/ static void ibmvfc_handle_crq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, struct list_head *evt_doneq) { long rc; struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); switch (crq->valid) { case IBMVFC_CRQ_INIT_RSP: switch (crq->format) { case IBMVFC_CRQ_INIT: dev_info(vhost->dev, "Partner initialized\n"); /* Send back a response */ rc = ibmvfc_send_crq_init_complete(vhost); if (rc == 0) ibmvfc_init_host(vhost); else dev_err(vhost->dev, "Unable to send init rsp. rc=%ld\n", rc); break; case IBMVFC_CRQ_INIT_COMPLETE: dev_info(vhost->dev, "Partner initialization complete\n"); ibmvfc_init_host(vhost); break; default: dev_err(vhost->dev, "Unknown crq message type: %d\n", crq->format); } return; case IBMVFC_CRQ_XPORT_EVENT: vhost->state = IBMVFC_NO_CRQ; vhost->logged_in = 0; ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); if (crq->format == IBMVFC_PARTITION_MIGRATED) { /* We need to re-setup the interpartition connection */ dev_info(vhost->dev, "Partition migrated, Re-enabling adapter\n"); vhost->client_migrated = 1; scsi_block_requests(vhost->host); ibmvfc_purge_requests(vhost, DID_REQUEUE); ibmvfc_set_host_state(vhost, IBMVFC_LINK_DOWN); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_REENABLE); wake_up(&vhost->work_wait_q); } else if (crq->format == IBMVFC_PARTNER_FAILED || crq->format == IBMVFC_PARTNER_DEREGISTER) { dev_err(vhost->dev, "Host partner adapter deregistered or failed (rc=%d)\n", crq->format); ibmvfc_purge_requests(vhost, DID_ERROR); ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_RESET); } else { dev_err(vhost->dev, "Received unknown transport event from partner (rc=%d)\n", crq->format); } return; case IBMVFC_CRQ_CMD_RSP: break; default: dev_err(vhost->dev, "Got an invalid message type 0x%02x\n", crq->valid); return; } if (crq->format == IBMVFC_ASYNC_EVENT) return; /* The only kind of payload CRQs we should get are responses to * things we send. Make sure this response is to something we * actually sent */ if (unlikely(!ibmvfc_valid_event(&vhost->crq.evt_pool, evt))) { dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", crq->ioba); return; } if (unlikely(atomic_dec_if_positive(&evt->active))) { dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", crq->ioba); return; } spin_lock(&evt->queue->l_lock); list_move_tail(&evt->queue_list, evt_doneq); spin_unlock(&evt->queue->l_lock); } /** * ibmvfc_scan_finished - Check if the device scan is done. * @shost: scsi host struct * @time: current elapsed time * * Returns: * 0 if scan is not done / 1 if scan is done **/ static int ibmvfc_scan_finished(struct Scsi_Host *shost, unsigned long time) { unsigned long flags; struct ibmvfc_host *vhost = shost_priv(shost); int done = 0; spin_lock_irqsave(shost->host_lock, flags); if (!vhost->scan_timeout) done = 1; else if (time >= (vhost->scan_timeout * HZ)) { dev_info(vhost->dev, "Scan taking longer than %d seconds, " "continuing initialization\n", vhost->scan_timeout); done = 1; } if (vhost->scan_complete) { vhost->scan_timeout = init_timeout; done = 1; } spin_unlock_irqrestore(shost->host_lock, flags); return done; } /** * ibmvfc_slave_alloc - Setup the device's task set value * @sdev: struct scsi_device device to configure * * Set the device's task set value so that error handling works as * expected. * * Returns: * 0 on success / -ENXIO if device does not exist **/ static int ibmvfc_slave_alloc(struct scsi_device *sdev) { struct Scsi_Host *shost = sdev->host; struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags = 0; if (!rport || fc_remote_port_chkready(rport)) return -ENXIO; spin_lock_irqsave(shost->host_lock, flags); sdev->hostdata = (void *)(unsigned long)vhost->task_set++; spin_unlock_irqrestore(shost->host_lock, flags); return 0; } /** * ibmvfc_target_alloc - Setup the target's task set value * @starget: struct scsi_target * * Set the target's task set value so that error handling works as * expected. * * Returns: * 0 on success / -ENXIO if device does not exist **/ static int ibmvfc_target_alloc(struct scsi_target *starget) { struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags = 0; spin_lock_irqsave(shost->host_lock, flags); starget->hostdata = (void *)(unsigned long)vhost->task_set++; spin_unlock_irqrestore(shost->host_lock, flags); return 0; } /** * ibmvfc_slave_configure - Configure the device * @sdev: struct scsi_device device to configure * * Enable allow_restart for a device if it is a disk. Adjust the * queue_depth here also. * * Returns: * 0 **/ static int ibmvfc_slave_configure(struct scsi_device *sdev) { struct Scsi_Host *shost = sdev->host; unsigned long flags = 0; spin_lock_irqsave(shost->host_lock, flags); if (sdev->type == TYPE_DISK) { sdev->allow_restart = 1; blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); } spin_unlock_irqrestore(shost->host_lock, flags); return 0; } /** * ibmvfc_change_queue_depth - Change the device's queue depth * @sdev: scsi device struct * @qdepth: depth to set * * Return value: * actual depth set **/ static int ibmvfc_change_queue_depth(struct scsi_device *sdev, int qdepth) { if (qdepth > IBMVFC_MAX_CMDS_PER_LUN) qdepth = IBMVFC_MAX_CMDS_PER_LUN; return scsi_change_queue_depth(sdev, qdepth); } static ssize_t ibmvfc_show_host_partition_name(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%s\n", vhost->login_buf->resp.partition_name); } static ssize_t ibmvfc_show_host_device_name(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%s\n", vhost->login_buf->resp.device_name); } static ssize_t ibmvfc_show_host_loc_code(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%s\n", vhost->login_buf->resp.port_loc_code); } static ssize_t ibmvfc_show_host_drc_name(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%s\n", vhost->login_buf->resp.drc_name); } static ssize_t ibmvfc_show_host_npiv_version(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%d\n", be32_to_cpu(vhost->login_buf->resp.version)); } static ssize_t ibmvfc_show_host_capabilities(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); return snprintf(buf, PAGE_SIZE, "%llx\n", be64_to_cpu(vhost->login_buf->resp.capabilities)); } /** * ibmvfc_show_log_level - Show the adapter's error logging level * @dev: class device struct * @attr: unused * @buf: buffer * * Return value: * number of bytes printed to buffer **/ static ssize_t ibmvfc_show_log_level(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags = 0; int len; spin_lock_irqsave(shost->host_lock, flags); len = snprintf(buf, PAGE_SIZE, "%d\n", vhost->log_level); spin_unlock_irqrestore(shost->host_lock, flags); return len; } /** * ibmvfc_store_log_level - Change the adapter's error logging level * @dev: class device struct * @attr: unused * @buf: buffer * @count: buffer size * * Return value: * number of bytes printed to buffer **/ static ssize_t ibmvfc_store_log_level(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags = 0; spin_lock_irqsave(shost->host_lock, flags); vhost->log_level = simple_strtoul(buf, NULL, 10); spin_unlock_irqrestore(shost->host_lock, flags); return strlen(buf); } static ssize_t ibmvfc_show_scsi_channels(struct device *dev, struct device_attribute *attr, char *buf) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); struct ibmvfc_channels *scsi = &vhost->scsi_scrqs; unsigned long flags = 0; int len; spin_lock_irqsave(shost->host_lock, flags); len = snprintf(buf, PAGE_SIZE, "%d\n", scsi->desired_queues); spin_unlock_irqrestore(shost->host_lock, flags); return len; } static ssize_t ibmvfc_store_scsi_channels(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); struct ibmvfc_channels *scsi = &vhost->scsi_scrqs; unsigned long flags = 0; unsigned int channels; spin_lock_irqsave(shost->host_lock, flags); channels = simple_strtoul(buf, NULL, 10); scsi->desired_queues = min(channels, shost->nr_hw_queues); ibmvfc_hard_reset_host(vhost); spin_unlock_irqrestore(shost->host_lock, flags); return strlen(buf); } static DEVICE_ATTR(partition_name, S_IRUGO, ibmvfc_show_host_partition_name, NULL); static DEVICE_ATTR(device_name, S_IRUGO, ibmvfc_show_host_device_name, NULL); static DEVICE_ATTR(port_loc_code, S_IRUGO, ibmvfc_show_host_loc_code, NULL); static DEVICE_ATTR(drc_name, S_IRUGO, ibmvfc_show_host_drc_name, NULL); static DEVICE_ATTR(npiv_version, S_IRUGO, ibmvfc_show_host_npiv_version, NULL); static DEVICE_ATTR(capabilities, S_IRUGO, ibmvfc_show_host_capabilities, NULL); static DEVICE_ATTR(log_level, S_IRUGO | S_IWUSR, ibmvfc_show_log_level, ibmvfc_store_log_level); static DEVICE_ATTR(nr_scsi_channels, S_IRUGO | S_IWUSR, ibmvfc_show_scsi_channels, ibmvfc_store_scsi_channels); #ifdef CONFIG_SCSI_IBMVFC_TRACE /** * ibmvfc_read_trace - Dump the adapter trace * @filp: open sysfs file * @kobj: kobject struct * @bin_attr: bin_attribute struct * @buf: buffer * @off: offset * @count: buffer size * * Return value: * number of bytes printed to buffer **/ static ssize_t ibmvfc_read_trace(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { struct device *dev = kobj_to_dev(kobj); struct Scsi_Host *shost = class_to_shost(dev); struct ibmvfc_host *vhost = shost_priv(shost); unsigned long flags = 0; int size = IBMVFC_TRACE_SIZE; char *src = (char *)vhost->trace; if (off > size) return 0; if (off + count > size) { size -= off; count = size; } spin_lock_irqsave(shost->host_lock, flags); memcpy(buf, &src[off], count); spin_unlock_irqrestore(shost->host_lock, flags); return count; } static struct bin_attribute ibmvfc_trace_attr = { .attr = { .name = "trace", .mode = S_IRUGO, }, .size = 0, .read = ibmvfc_read_trace, }; #endif static struct attribute *ibmvfc_host_attrs[] = { &dev_attr_partition_name.attr, &dev_attr_device_name.attr, &dev_attr_port_loc_code.attr, &dev_attr_drc_name.attr, &dev_attr_npiv_version.attr, &dev_attr_capabilities.attr, &dev_attr_log_level.attr, &dev_attr_nr_scsi_channels.attr, NULL }; ATTRIBUTE_GROUPS(ibmvfc_host); static const struct scsi_host_template driver_template = { .module = THIS_MODULE, .name = "IBM POWER Virtual FC Adapter", .proc_name = IBMVFC_NAME, .queuecommand = ibmvfc_queuecommand, .eh_timed_out = fc_eh_timed_out, .eh_abort_handler = ibmvfc_eh_abort_handler, .eh_device_reset_handler = ibmvfc_eh_device_reset_handler, .eh_target_reset_handler = ibmvfc_eh_target_reset_handler, .eh_host_reset_handler = ibmvfc_eh_host_reset_handler, .slave_alloc = ibmvfc_slave_alloc, .slave_configure = ibmvfc_slave_configure, .target_alloc = ibmvfc_target_alloc, .scan_finished = ibmvfc_scan_finished, .change_queue_depth = ibmvfc_change_queue_depth, .cmd_per_lun = 16, .can_queue = IBMVFC_MAX_REQUESTS_DEFAULT, .this_id = -1, .sg_tablesize = SG_ALL, .max_sectors = IBMVFC_MAX_SECTORS, .shost_groups = ibmvfc_host_groups, .track_queue_depth = 1, }; /** * ibmvfc_next_async_crq - Returns the next entry in async queue * @vhost: ibmvfc host struct * * Returns: * Pointer to next entry in queue / NULL if empty **/ static struct ibmvfc_async_crq *ibmvfc_next_async_crq(struct ibmvfc_host *vhost) { struct ibmvfc_queue *async_crq = &vhost->async_crq; struct ibmvfc_async_crq *crq; crq = &async_crq->msgs.async[async_crq->cur]; if (crq->valid & 0x80) { if (++async_crq->cur == async_crq->size) async_crq->cur = 0; rmb(); } else crq = NULL; return crq; } /** * ibmvfc_next_crq - Returns the next entry in message queue * @vhost: ibmvfc host struct * * Returns: * Pointer to next entry in queue / NULL if empty **/ static struct ibmvfc_crq *ibmvfc_next_crq(struct ibmvfc_host *vhost) { struct ibmvfc_queue *queue = &vhost->crq; struct ibmvfc_crq *crq; crq = &queue->msgs.crq[queue->cur]; if (crq->valid & 0x80) { if (++queue->cur == queue->size) queue->cur = 0; rmb(); } else crq = NULL; return crq; } /** * ibmvfc_interrupt - Interrupt handler * @irq: number of irq to handle, not used * @dev_instance: ibmvfc_host that received interrupt * * Returns: * IRQ_HANDLED **/ static irqreturn_t ibmvfc_interrupt(int irq, void *dev_instance) { struct ibmvfc_host *vhost = (struct ibmvfc_host *)dev_instance; unsigned long flags; spin_lock_irqsave(vhost->host->host_lock, flags); vio_disable_interrupts(to_vio_dev(vhost->dev)); tasklet_schedule(&vhost->tasklet); spin_unlock_irqrestore(vhost->host->host_lock, flags); return IRQ_HANDLED; } /** * ibmvfc_tasklet - Interrupt handler tasklet * @data: ibmvfc host struct * * Returns: * Nothing **/ static void ibmvfc_tasklet(void *data) { struct ibmvfc_host *vhost = data; struct vio_dev *vdev = to_vio_dev(vhost->dev); struct ibmvfc_crq *crq; struct ibmvfc_async_crq *async; struct ibmvfc_event *evt, *temp; unsigned long flags; int done = 0; LIST_HEAD(evt_doneq); spin_lock_irqsave(vhost->host->host_lock, flags); spin_lock(vhost->crq.q_lock); while (!done) { /* Pull all the valid messages off the async CRQ */ while ((async = ibmvfc_next_async_crq(vhost)) != NULL) { ibmvfc_handle_async(async, vhost); async->valid = 0; wmb(); } /* Pull all the valid messages off the CRQ */ while ((crq = ibmvfc_next_crq(vhost)) != NULL) { ibmvfc_handle_crq(crq, vhost, &evt_doneq); crq->valid = 0; wmb(); } vio_enable_interrupts(vdev); if ((async = ibmvfc_next_async_crq(vhost)) != NULL) { vio_disable_interrupts(vdev); ibmvfc_handle_async(async, vhost); async->valid = 0; wmb(); } else if ((crq = ibmvfc_next_crq(vhost)) != NULL) { vio_disable_interrupts(vdev); ibmvfc_handle_crq(crq, vhost, &evt_doneq); crq->valid = 0; wmb(); } else done = 1; } spin_unlock(vhost->crq.q_lock); spin_unlock_irqrestore(vhost->host->host_lock, flags); list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { del_timer(&evt->timer); list_del(&evt->queue_list); ibmvfc_trc_end(evt); evt->done(evt); } } static int ibmvfc_toggle_scrq_irq(struct ibmvfc_queue *scrq, int enable) { struct device *dev = scrq->vhost->dev; struct vio_dev *vdev = to_vio_dev(dev); unsigned long rc; int irq_action = H_ENABLE_VIO_INTERRUPT; if (!enable) irq_action = H_DISABLE_VIO_INTERRUPT; rc = plpar_hcall_norets(H_VIOCTL, vdev->unit_address, irq_action, scrq->hw_irq, 0, 0); if (rc) dev_err(dev, "Couldn't %s sub-crq[%lu] irq. rc=%ld\n", enable ? "enable" : "disable", scrq->hwq_id, rc); return rc; } static void ibmvfc_handle_scrq(struct ibmvfc_crq *crq, struct ibmvfc_host *vhost, struct list_head *evt_doneq) { struct ibmvfc_event *evt = (struct ibmvfc_event *)be64_to_cpu(crq->ioba); switch (crq->valid) { case IBMVFC_CRQ_CMD_RSP: break; case IBMVFC_CRQ_XPORT_EVENT: return; default: dev_err(vhost->dev, "Got and invalid message type 0x%02x\n", crq->valid); return; } /* The only kind of payload CRQs we should get are responses to * things we send. Make sure this response is to something we * actually sent */ if (unlikely(!ibmvfc_valid_event(&evt->queue->evt_pool, evt))) { dev_err(vhost->dev, "Returned correlation_token 0x%08llx is invalid!\n", crq->ioba); return; } if (unlikely(atomic_dec_if_positive(&evt->active))) { dev_err(vhost->dev, "Received duplicate correlation_token 0x%08llx!\n", crq->ioba); return; } spin_lock(&evt->queue->l_lock); list_move_tail(&evt->queue_list, evt_doneq); spin_unlock(&evt->queue->l_lock); } static struct ibmvfc_crq *ibmvfc_next_scrq(struct ibmvfc_queue *scrq) { struct ibmvfc_crq *crq; crq = &scrq->msgs.scrq[scrq->cur].crq; if (crq->valid & 0x80) { if (++scrq->cur == scrq->size) scrq->cur = 0; rmb(); } else crq = NULL; return crq; } static void ibmvfc_drain_sub_crq(struct ibmvfc_queue *scrq) { struct ibmvfc_crq *crq; struct ibmvfc_event *evt, *temp; unsigned long flags; int done = 0; LIST_HEAD(evt_doneq); spin_lock_irqsave(scrq->q_lock, flags); while (!done) { while ((crq = ibmvfc_next_scrq(scrq)) != NULL) { ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); crq->valid = 0; wmb(); } ibmvfc_toggle_scrq_irq(scrq, 1); if ((crq = ibmvfc_next_scrq(scrq)) != NULL) { ibmvfc_toggle_scrq_irq(scrq, 0); ibmvfc_handle_scrq(crq, scrq->vhost, &evt_doneq); crq->valid = 0; wmb(); } else done = 1; } spin_unlock_irqrestore(scrq->q_lock, flags); list_for_each_entry_safe(evt, temp, &evt_doneq, queue_list) { del_timer(&evt->timer); list_del(&evt->queue_list); ibmvfc_trc_end(evt); evt->done(evt); } } static irqreturn_t ibmvfc_interrupt_mq(int irq, void *scrq_instance) { struct ibmvfc_queue *scrq = (struct ibmvfc_queue *)scrq_instance; ibmvfc_toggle_scrq_irq(scrq, 0); ibmvfc_drain_sub_crq(scrq); return IRQ_HANDLED; } /** * ibmvfc_init_tgt - Set the next init job step for the target * @tgt: ibmvfc target struct * @job_step: job step to perform * **/ static void ibmvfc_init_tgt(struct ibmvfc_target *tgt, void (*job_step) (struct ibmvfc_target *)) { if (!ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT)) tgt->job_step = job_step; wake_up(&tgt->vhost->work_wait_q); } /** * ibmvfc_retry_tgt_init - Attempt to retry a step in target initialization * @tgt: ibmvfc target struct * @job_step: initialization job step * * Returns: 1 if step will be retried / 0 if not * **/ static int ibmvfc_retry_tgt_init(struct ibmvfc_target *tgt, void (*job_step) (struct ibmvfc_target *)) { if (++tgt->init_retries > IBMVFC_MAX_TGT_INIT_RETRIES) { ibmvfc_del_tgt(tgt); wake_up(&tgt->vhost->work_wait_q); return 0; } else ibmvfc_init_tgt(tgt, job_step); return 1; } /* Defined in FC-LS */ static const struct { int code; int retry; int logged_in; } prli_rsp [] = { { 0, 1, 0 }, { 1, 0, 1 }, { 2, 1, 0 }, { 3, 1, 0 }, { 4, 0, 0 }, { 5, 0, 0 }, { 6, 0, 1 }, { 7, 0, 0 }, { 8, 1, 0 }, }; /** * ibmvfc_get_prli_rsp - Find PRLI response index * @flags: PRLI response flags * **/ static int ibmvfc_get_prli_rsp(u16 flags) { int i; int code = (flags & 0x0f00) >> 8; for (i = 0; i < ARRAY_SIZE(prli_rsp); i++) if (prli_rsp[i].code == code) return i; return 0; } /** * ibmvfc_tgt_prli_done - Completion handler for Process Login * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_prli_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_process_login *rsp = &evt->xfer_iu->prli; struct ibmvfc_prli_svc_parms *parms = &rsp->parms; u32 status = be16_to_cpu(rsp->common.status); int index, level = IBMVFC_DEFAULT_LOG_LEVEL; vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "Process Login succeeded: %X %02X %04X\n", parms->type, parms->flags, parms->service_parms); if (parms->type == IBMVFC_SCSI_FCP_TYPE) { index = ibmvfc_get_prli_rsp(be16_to_cpu(parms->flags)); if (prli_rsp[index].logged_in) { if (be16_to_cpu(parms->flags) & IBMVFC_PRLI_EST_IMG_PAIR) { tgt->need_login = 0; tgt->ids.roles = 0; if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_TARGET_FUNC) tgt->ids.roles |= FC_PORT_ROLE_FCP_TARGET; if (be32_to_cpu(parms->service_parms) & IBMVFC_PRLI_INITIATOR_FUNC) tgt->ids.roles |= FC_PORT_ROLE_FCP_INITIATOR; tgt->add_rport = 1; } else ibmvfc_del_tgt(tgt); } else if (prli_rsp[index].retry) ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); else ibmvfc_del_tgt(tgt); } else ibmvfc_del_tgt(tgt); break; case IBMVFC_MAD_DRIVER_FAILED: break; case IBMVFC_MAD_CRQ_ERROR: ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); break; case IBMVFC_MAD_FAILED: default: if ((be16_to_cpu(rsp->status) & IBMVFC_VIOS_FAILURE) && be16_to_cpu(rsp->error) == IBMVFC_PLOGI_REQUIRED) level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); else if (tgt->logo_rcvd) level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_prli); else ibmvfc_del_tgt(tgt); tgt_log(tgt, level, "Process Login failed: %s (%x:%x) rc=0x%02X\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), status); break; } kref_put(&tgt->kref, ibmvfc_release_tgt); ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_tgt_send_prli - Send a process login * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_send_prli(struct ibmvfc_target *tgt) { struct ibmvfc_process_login *prli; struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } vhost->discovery_threads++; ibmvfc_init_event(evt, ibmvfc_tgt_prli_done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; prli = &evt->iu.prli; memset(prli, 0, sizeof(*prli)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { prli->common.version = cpu_to_be32(2); prli->target_wwpn = cpu_to_be64(tgt->wwpn); } else { prli->common.version = cpu_to_be32(1); } prli->common.opcode = cpu_to_be32(IBMVFC_PROCESS_LOGIN); prli->common.length = cpu_to_be16(sizeof(*prli)); prli->scsi_id = cpu_to_be64(tgt->scsi_id); prli->parms.type = IBMVFC_SCSI_FCP_TYPE; prli->parms.flags = cpu_to_be16(IBMVFC_PRLI_EST_IMG_PAIR); prli->parms.service_parms = cpu_to_be32(IBMVFC_PRLI_INITIATOR_FUNC); prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_READ_FCP_XFER_RDY_DISABLED); if (cls3_error) prli->parms.service_parms |= cpu_to_be32(IBMVFC_PRLI_RETRY); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent process login\n"); } /** * ibmvfc_tgt_plogi_done - Completion handler for Port Login * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_plogi_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_port_login *rsp = &evt->xfer_iu->plogi; u32 status = be16_to_cpu(rsp->common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "Port Login succeeded\n"); if (tgt->ids.port_name && tgt->ids.port_name != wwn_to_u64(rsp->service_parms.port_name)) { vhost->reinit = 1; tgt_dbg(tgt, "Port re-init required\n"); break; } tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); tgt->ids.port_id = tgt->scsi_id; memcpy(&tgt->service_parms, &rsp->service_parms, sizeof(tgt->service_parms)); memcpy(&tgt->service_parms_change, &rsp->service_parms_change, sizeof(tgt->service_parms_change)); ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); break; case IBMVFC_MAD_DRIVER_FAILED: break; case IBMVFC_MAD_CRQ_ERROR: ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); break; case IBMVFC_MAD_FAILED: default: if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_send_plogi); else ibmvfc_del_tgt(tgt); tgt_log(tgt, level, "Port Login failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), ibmvfc_get_ls_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); break; } kref_put(&tgt->kref, ibmvfc_release_tgt); ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_tgt_send_plogi - Send PLOGI to the specified target * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_send_plogi(struct ibmvfc_target *tgt) { struct ibmvfc_port_login *plogi; struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; kref_get(&tgt->kref); tgt->logo_rcvd = 0; evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } vhost->discovery_threads++; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); ibmvfc_init_event(evt, ibmvfc_tgt_plogi_done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; plogi = &evt->iu.plogi; memset(plogi, 0, sizeof(*plogi)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { plogi->common.version = cpu_to_be32(2); plogi->target_wwpn = cpu_to_be64(tgt->wwpn); } else { plogi->common.version = cpu_to_be32(1); } plogi->common.opcode = cpu_to_be32(IBMVFC_PORT_LOGIN); plogi->common.length = cpu_to_be16(sizeof(*plogi)); plogi->scsi_id = cpu_to_be64(tgt->scsi_id); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent port login\n"); } /** * ibmvfc_tgt_implicit_logout_done - Completion handler for Implicit Logout MAD * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_implicit_logout_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_implicit_logout *rsp = &evt->xfer_iu->implicit_logout; u32 status = be16_to_cpu(rsp->common.status); vhost->discovery_threads--; ibmvfc_free_event(evt); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "Implicit Logout succeeded\n"); break; case IBMVFC_MAD_DRIVER_FAILED: kref_put(&tgt->kref, ibmvfc_release_tgt); wake_up(&vhost->work_wait_q); return; case IBMVFC_MAD_FAILED: default: tgt_err(tgt, "Implicit Logout failed: rc=0x%02X\n", status); break; } ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_plogi); kref_put(&tgt->kref, ibmvfc_release_tgt); wake_up(&vhost->work_wait_q); } /** * __ibmvfc_tgt_get_implicit_logout_evt - Allocate and init an event for implicit logout * @tgt: ibmvfc target struct * @done: Routine to call when the event is responded to * * Returns: * Allocated and initialized ibmvfc_event struct **/ static struct ibmvfc_event *__ibmvfc_tgt_get_implicit_logout_evt(struct ibmvfc_target *tgt, void (*done) (struct ibmvfc_event *)) { struct ibmvfc_implicit_logout *mad; struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) return NULL; ibmvfc_init_event(evt, done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; mad = &evt->iu.implicit_logout; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_IMPLICIT_LOGOUT); mad->common.length = cpu_to_be16(sizeof(*mad)); mad->old_scsi_id = cpu_to_be64(tgt->scsi_id); return evt; } /** * ibmvfc_tgt_implicit_logout - Initiate an Implicit Logout for specified target * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_implicit_logout(struct ibmvfc_target *tgt) { struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; vhost->discovery_threads++; evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, ibmvfc_tgt_implicit_logout_done); if (!evt) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent Implicit Logout\n"); } /** * ibmvfc_tgt_implicit_logout_and_del_done - Completion handler for Implicit Logout MAD * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_implicit_logout_and_del_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; u32 status = be16_to_cpu(mad->common.status); vhost->discovery_threads--; ibmvfc_free_event(evt); /* * If our state is IBMVFC_HOST_OFFLINE, we could be unloading the * driver in which case we need to free up all the targets. If we are * not unloading, we will still go through a hard reset to get out of * offline state, so there is no need to track the old targets in that * case. */ if (status == IBMVFC_MAD_SUCCESS || vhost->state == IBMVFC_HOST_OFFLINE) ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); else ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT); tgt_dbg(tgt, "Implicit Logout %s\n", (status == IBMVFC_MAD_SUCCESS) ? "succeeded" : "failed"); kref_put(&tgt->kref, ibmvfc_release_tgt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_tgt_implicit_logout_and_del - Initiate an Implicit Logout for specified target * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_implicit_logout_and_del(struct ibmvfc_target *tgt) { struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (!vhost->logged_in) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); return; } if (vhost->discovery_threads >= disc_threads) return; vhost->discovery_threads++; evt = __ibmvfc_tgt_get_implicit_logout_evt(tgt, ibmvfc_tgt_implicit_logout_and_del_done); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent Implicit Logout\n"); } /** * ibmvfc_tgt_move_login_done - Completion handler for Move Login * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_move_login_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_move_login *rsp = &evt->xfer_iu->move_login; u32 status = be16_to_cpu(rsp->common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "Move Login succeeded for new scsi_id: %llX\n", tgt->new_scsi_id); tgt->ids.node_name = wwn_to_u64(rsp->service_parms.node_name); tgt->ids.port_name = wwn_to_u64(rsp->service_parms.port_name); tgt->scsi_id = tgt->new_scsi_id; tgt->ids.port_id = tgt->scsi_id; memcpy(&tgt->service_parms, &rsp->service_parms, sizeof(tgt->service_parms)); memcpy(&tgt->service_parms_change, &rsp->service_parms_change, sizeof(tgt->service_parms_change)); ibmvfc_init_tgt(tgt, ibmvfc_tgt_send_prli); break; case IBMVFC_MAD_DRIVER_FAILED: break; case IBMVFC_MAD_CRQ_ERROR: ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); break; case IBMVFC_MAD_FAILED: default: level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_move_login); tgt_log(tgt, level, "Move Login failed: new scsi_id: %llX, flags:%x, vios_flags:%x, rc=0x%02X\n", tgt->new_scsi_id, be32_to_cpu(rsp->flags), be16_to_cpu(rsp->vios_flags), status); break; } kref_put(&tgt->kref, ibmvfc_release_tgt); ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_tgt_move_login - Initiate a move login for specified target * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_move_login(struct ibmvfc_target *tgt) { struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_move_login *move; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } vhost->discovery_threads++; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); ibmvfc_init_event(evt, ibmvfc_tgt_move_login_done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; move = &evt->iu.move_login; memset(move, 0, sizeof(*move)); move->common.version = cpu_to_be32(1); move->common.opcode = cpu_to_be32(IBMVFC_MOVE_LOGIN); move->common.length = cpu_to_be16(sizeof(*move)); move->old_scsi_id = cpu_to_be64(tgt->scsi_id); move->new_scsi_id = cpu_to_be64(tgt->new_scsi_id); move->wwpn = cpu_to_be64(tgt->wwpn); move->node_name = cpu_to_be64(tgt->ids.node_name); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DEL_RPORT); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent Move Login for new scsi_id: %llX\n", tgt->new_scsi_id); } /** * ibmvfc_adisc_needs_plogi - Does device need PLOGI? * @mad: ibmvfc passthru mad struct * @tgt: ibmvfc target struct * * Returns: * 1 if PLOGI needed / 0 if PLOGI not needed **/ static int ibmvfc_adisc_needs_plogi(struct ibmvfc_passthru_mad *mad, struct ibmvfc_target *tgt) { if (wwn_to_u64((u8 *)&mad->fc_iu.response[2]) != tgt->ids.port_name) return 1; if (wwn_to_u64((u8 *)&mad->fc_iu.response[4]) != tgt->ids.node_name) return 1; if (be32_to_cpu(mad->fc_iu.response[6]) != tgt->scsi_id) return 1; return 0; } /** * ibmvfc_tgt_adisc_done - Completion handler for ADISC * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_adisc_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_passthru_mad *mad = &evt->xfer_iu->passthru; u32 status = be16_to_cpu(mad->common.status); u8 fc_reason, fc_explain; vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); del_timer(&tgt->timer); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "ADISC succeeded\n"); if (ibmvfc_adisc_needs_plogi(mad, tgt)) ibmvfc_del_tgt(tgt); break; case IBMVFC_MAD_DRIVER_FAILED: break; case IBMVFC_MAD_FAILED: default: ibmvfc_del_tgt(tgt); fc_reason = (be32_to_cpu(mad->fc_iu.response[1]) & 0x00ff0000) >> 16; fc_explain = (be32_to_cpu(mad->fc_iu.response[1]) & 0x0000ff00) >> 8; tgt_info(tgt, "ADISC failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", ibmvfc_get_cmd_error(be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error)), be16_to_cpu(mad->iu.status), be16_to_cpu(mad->iu.error), ibmvfc_get_fc_type(fc_reason), fc_reason, ibmvfc_get_ls_explain(fc_explain), fc_explain, status); break; } kref_put(&tgt->kref, ibmvfc_release_tgt); ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_init_passthru - Initialize an event struct for FC passthru * @evt: ibmvfc event struct * **/ static void ibmvfc_init_passthru(struct ibmvfc_event *evt) { struct ibmvfc_passthru_mad *mad = &evt->iu.passthru; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_PASSTHRU); mad->common.length = cpu_to_be16(sizeof(*mad) - sizeof(mad->fc_iu) - sizeof(mad->iu)); mad->cmd_ioba.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_passthru_mad, iu)); mad->cmd_ioba.len = cpu_to_be32(sizeof(mad->iu)); mad->iu.cmd_len = cpu_to_be32(sizeof(mad->fc_iu.payload)); mad->iu.rsp_len = cpu_to_be32(sizeof(mad->fc_iu.response)); mad->iu.cmd.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_passthru_mad, fc_iu) + offsetof(struct ibmvfc_passthru_fc_iu, payload)); mad->iu.cmd.len = cpu_to_be32(sizeof(mad->fc_iu.payload)); mad->iu.rsp.va = cpu_to_be64((u64)be64_to_cpu(evt->crq.ioba) + offsetof(struct ibmvfc_passthru_mad, fc_iu) + offsetof(struct ibmvfc_passthru_fc_iu, response)); mad->iu.rsp.len = cpu_to_be32(sizeof(mad->fc_iu.response)); } /** * ibmvfc_tgt_adisc_cancel_done - Completion handler when cancelling an ADISC * @evt: ibmvfc event struct * * Just cleanup this event struct. Everything else is handled by * the ADISC completion handler. If the ADISC never actually comes * back, we still have the timer running on the ADISC event struct * which will fire and cause the CRQ to get reset. * **/ static void ibmvfc_tgt_adisc_cancel_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_target *tgt = evt->tgt; tgt_dbg(tgt, "ADISC cancel complete\n"); vhost->abort_threads--; ibmvfc_free_event(evt); kref_put(&tgt->kref, ibmvfc_release_tgt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_adisc_timeout - Handle an ADISC timeout * @t: ibmvfc target struct * * If an ADISC times out, send a cancel. If the cancel times * out, reset the CRQ. When the ADISC comes back as cancelled, * log back into the target. **/ static void ibmvfc_adisc_timeout(struct timer_list *t) { struct ibmvfc_target *tgt = from_timer(tgt, t, timer); struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; struct ibmvfc_tmf *tmf; unsigned long flags; int rc; tgt_dbg(tgt, "ADISC timeout\n"); spin_lock_irqsave(vhost->host->host_lock, flags); if (vhost->abort_threads >= disc_threads || tgt->action != IBMVFC_TGT_ACTION_INIT_WAIT || vhost->state != IBMVFC_INITIALIZING || vhost->action != IBMVFC_HOST_ACTION_QUERY_TGTS) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return; } vhost->abort_threads++; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { tgt_err(tgt, "Failed to get cancel event for ADISC.\n"); vhost->abort_threads--; kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); return; } ibmvfc_init_event(evt, ibmvfc_tgt_adisc_cancel_done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; tmf = &evt->iu.tmf; memset(tmf, 0, sizeof(*tmf)); if (ibmvfc_check_caps(vhost, IBMVFC_HANDLE_VF_WWPN)) { tmf->common.version = cpu_to_be32(2); tmf->target_wwpn = cpu_to_be64(tgt->wwpn); } else { tmf->common.version = cpu_to_be32(1); } tmf->common.opcode = cpu_to_be32(IBMVFC_TMF_MAD); tmf->common.length = cpu_to_be16(sizeof(*tmf)); tmf->scsi_id = cpu_to_be64(tgt->scsi_id); tmf->cancel_key = cpu_to_be32(tgt->cancel_key); rc = ibmvfc_send_event(evt, vhost, default_timeout); if (rc) { tgt_err(tgt, "Failed to send cancel event for ADISC. rc=%d\n", rc); vhost->abort_threads--; kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); } else tgt_dbg(tgt, "Attempting to cancel ADISC\n"); spin_unlock_irqrestore(vhost->host->host_lock, flags); } /** * ibmvfc_tgt_adisc - Initiate an ADISC for specified target * @tgt: ibmvfc target struct * * When sending an ADISC we end up with two timers running. The * first timer is the timer in the ibmvfc target struct. If this * fires, we send a cancel to the target. The second timer is the * timer on the ibmvfc event for the ADISC, which is longer. If that * fires, it means the ADISC timed out and our attempt to cancel it * also failed, so we need to reset the CRQ. **/ static void ibmvfc_tgt_adisc(struct ibmvfc_target *tgt) { struct ibmvfc_passthru_mad *mad; struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } vhost->discovery_threads++; ibmvfc_init_event(evt, ibmvfc_tgt_adisc_done, IBMVFC_MAD_FORMAT); evt->tgt = tgt; ibmvfc_init_passthru(evt); mad = &evt->iu.passthru; mad->iu.flags = cpu_to_be32(IBMVFC_FC_ELS); mad->iu.scsi_id = cpu_to_be64(tgt->scsi_id); mad->iu.cancel_key = cpu_to_be32(tgt->cancel_key); mad->fc_iu.payload[0] = cpu_to_be32(IBMVFC_ADISC); memcpy(&mad->fc_iu.payload[2], &vhost->login_buf->resp.port_name, sizeof(vhost->login_buf->resp.port_name)); memcpy(&mad->fc_iu.payload[4], &vhost->login_buf->resp.node_name, sizeof(vhost->login_buf->resp.node_name)); mad->fc_iu.payload[6] = cpu_to_be32(be64_to_cpu(vhost->login_buf->resp.scsi_id) & 0x00ffffff); if (timer_pending(&tgt->timer)) mod_timer(&tgt->timer, jiffies + (IBMVFC_ADISC_TIMEOUT * HZ)); else { tgt->timer.expires = jiffies + (IBMVFC_ADISC_TIMEOUT * HZ); add_timer(&tgt->timer); } ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); if (ibmvfc_send_event(evt, vhost, IBMVFC_ADISC_PLUS_CANCEL_TIMEOUT)) { vhost->discovery_threads--; del_timer(&tgt->timer); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent ADISC\n"); } /** * ibmvfc_tgt_query_target_done - Completion handler for Query Target MAD * @evt: ibmvfc event struct * **/ static void ibmvfc_tgt_query_target_done(struct ibmvfc_event *evt) { struct ibmvfc_target *tgt = evt->tgt; struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_query_tgt *rsp = &evt->xfer_iu->query_tgt; u32 status = be16_to_cpu(rsp->common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); switch (status) { case IBMVFC_MAD_SUCCESS: tgt_dbg(tgt, "Query Target succeeded\n"); if (be64_to_cpu(rsp->scsi_id) != tgt->scsi_id) ibmvfc_del_tgt(tgt); else ibmvfc_init_tgt(tgt, ibmvfc_tgt_adisc); break; case IBMVFC_MAD_DRIVER_FAILED: break; case IBMVFC_MAD_CRQ_ERROR: ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); break; case IBMVFC_MAD_FAILED: default: if ((be16_to_cpu(rsp->status) & IBMVFC_FABRIC_MAPPED) == IBMVFC_FABRIC_MAPPED && be16_to_cpu(rsp->error) == IBMVFC_UNABLE_TO_PERFORM_REQ && be16_to_cpu(rsp->fc_explain) == IBMVFC_PORT_NAME_NOT_REG) ibmvfc_del_tgt(tgt); else if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) level += ibmvfc_retry_tgt_init(tgt, ibmvfc_tgt_query_target); else ibmvfc_del_tgt(tgt); tgt_log(tgt, level, "Query Target failed: %s (%x:%x) %s (%x) %s (%x) rc=0x%02X\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), be16_to_cpu(rsp->status), be16_to_cpu(rsp->error), ibmvfc_get_fc_type(be16_to_cpu(rsp->fc_type)), be16_to_cpu(rsp->fc_type), ibmvfc_get_gs_explain(be16_to_cpu(rsp->fc_explain)), be16_to_cpu(rsp->fc_explain), status); break; } kref_put(&tgt->kref, ibmvfc_release_tgt); ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_tgt_query_target - Initiate a Query Target for specified target * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_query_target(struct ibmvfc_target *tgt) { struct ibmvfc_query_tgt *query_tgt; struct ibmvfc_host *vhost = tgt->vhost; struct ibmvfc_event *evt; if (vhost->discovery_threads >= disc_threads) return; kref_get(&tgt->kref); evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); __ibmvfc_reset_host(vhost); return; } vhost->discovery_threads++; evt->tgt = tgt; ibmvfc_init_event(evt, ibmvfc_tgt_query_target_done, IBMVFC_MAD_FORMAT); query_tgt = &evt->iu.query_tgt; memset(query_tgt, 0, sizeof(*query_tgt)); query_tgt->common.version = cpu_to_be32(1); query_tgt->common.opcode = cpu_to_be32(IBMVFC_QUERY_TARGET); query_tgt->common.length = cpu_to_be16(sizeof(*query_tgt)); query_tgt->wwpn = cpu_to_be64(tgt->ids.port_name); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_INIT_WAIT); if (ibmvfc_send_event(evt, vhost, default_timeout)) { vhost->discovery_threads--; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_NONE); kref_put(&tgt->kref, ibmvfc_release_tgt); } else tgt_dbg(tgt, "Sent Query Target\n"); } /** * ibmvfc_alloc_target - Allocate and initialize an ibmvfc target * @vhost: ibmvfc host struct * @target: Holds SCSI ID to allocate target forand the WWPN * * Returns: * 0 on success / other on failure **/ static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, struct ibmvfc_discover_targets_entry *target) { struct ibmvfc_target *stgt = NULL; struct ibmvfc_target *wtgt = NULL; struct ibmvfc_target *tgt; unsigned long flags; u64 scsi_id = be32_to_cpu(target->scsi_id) & IBMVFC_DISC_TGT_SCSI_ID_MASK; u64 wwpn = be64_to_cpu(target->wwpn); /* Look to see if we already have a target allocated for this SCSI ID or WWPN */ spin_lock_irqsave(vhost->host->host_lock, flags); list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->wwpn == wwpn) { wtgt = tgt; break; } } list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->scsi_id == scsi_id) { stgt = tgt; break; } } if (wtgt && !stgt) { /* * A WWPN target has moved and we still are tracking the old * SCSI ID. The only way we should be able to get here is if * we attempted to send an implicit logout for the old SCSI ID * and it failed for some reason, such as there being I/O * pending to the target. In this case, we will have already * deleted the rport from the FC transport so we do a move * login, which works even with I/O pending, however, if * there is still I/O pending, it will stay outstanding, so * we only do this if fast fail is disabled for the rport, * otherwise we let terminate_rport_io clean up the port * before we login at the new location. */ if (wtgt->action == IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT) { if (wtgt->move_login) { /* * Do a move login here. The old target is no longer * known to the transport layer We don't use the * normal ibmvfc_set_tgt_action to set this, as we * don't normally want to allow this state change. */ wtgt->new_scsi_id = scsi_id; wtgt->action = IBMVFC_TGT_ACTION_INIT; wtgt->init_retries = 0; ibmvfc_init_tgt(wtgt, ibmvfc_tgt_move_login); } goto unlock_out; } else { tgt_err(wtgt, "Unexpected target state: %d, %p\n", wtgt->action, wtgt->rport); } } else if (stgt) { if (tgt->need_login) ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); goto unlock_out; } spin_unlock_irqrestore(vhost->host->host_lock, flags); tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO); memset(tgt, 0, sizeof(*tgt)); tgt->scsi_id = scsi_id; tgt->wwpn = wwpn; tgt->vhost = vhost; tgt->need_login = 1; timer_setup(&tgt->timer, ibmvfc_adisc_timeout, 0); kref_init(&tgt->kref); ibmvfc_init_tgt(tgt, ibmvfc_tgt_implicit_logout); spin_lock_irqsave(vhost->host->host_lock, flags); tgt->cancel_key = vhost->task_set++; list_add_tail(&tgt->queue, &vhost->targets); unlock_out: spin_unlock_irqrestore(vhost->host->host_lock, flags); return 0; } /** * ibmvfc_alloc_targets - Allocate and initialize ibmvfc targets * @vhost: ibmvfc host struct * * Returns: * 0 on success / other on failure **/ static int ibmvfc_alloc_targets(struct ibmvfc_host *vhost) { int i, rc; for (i = 0, rc = 0; !rc && i < vhost->num_targets; i++) rc = ibmvfc_alloc_target(vhost, &vhost->scsi_scrqs.disc_buf[i]); return rc; } /** * ibmvfc_discover_targets_done - Completion handler for discover targets MAD * @evt: ibmvfc event struct * **/ static void ibmvfc_discover_targets_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_discover_targets *rsp = &evt->xfer_iu->discover_targets; u32 mad_status = be16_to_cpu(rsp->common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; switch (mad_status) { case IBMVFC_MAD_SUCCESS: ibmvfc_dbg(vhost, "Discover Targets succeeded\n"); vhost->num_targets = be32_to_cpu(rsp->num_written); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_ALLOC_TGTS); break; case IBMVFC_MAD_FAILED: level += ibmvfc_retry_host_init(vhost); ibmvfc_log(vhost, level, "Discover Targets failed: %s (%x:%x)\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); break; case IBMVFC_MAD_DRIVER_FAILED: break; default: dev_err(vhost->dev, "Invalid Discover Targets response: 0x%x\n", mad_status); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); break; } ibmvfc_free_event(evt); wake_up(&vhost->work_wait_q); } /** * ibmvfc_discover_targets - Send Discover Targets MAD * @vhost: ibmvfc host struct * **/ static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) { struct ibmvfc_discover_targets *mad; struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); int level = IBMVFC_DEFAULT_LOG_LEVEL; if (!evt) { ibmvfc_log(vhost, level, "Discover Targets failed: no available events\n"); ibmvfc_hard_reset_host(vhost); return; } ibmvfc_init_event(evt, ibmvfc_discover_targets_done, IBMVFC_MAD_FORMAT); mad = &evt->iu.discover_targets; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_DISC_TARGETS); mad->common.length = cpu_to_be16(sizeof(*mad)); mad->bufflen = cpu_to_be32(vhost->scsi_scrqs.disc_buf_sz); mad->buffer.va = cpu_to_be64(vhost->scsi_scrqs.disc_buf_dma); mad->buffer.len = cpu_to_be32(vhost->scsi_scrqs.disc_buf_sz); mad->flags = cpu_to_be32(IBMVFC_DISC_TGT_PORT_ID_WWPN_LIST); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) ibmvfc_dbg(vhost, "Sent discover targets\n"); else ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); } static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_channel_setup *setup = vhost->channel_setup_buf; struct ibmvfc_channels *scrqs = &vhost->scsi_scrqs; u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; int flags, active_queues, i; ibmvfc_free_event(evt); switch (mad_status) { case IBMVFC_MAD_SUCCESS: ibmvfc_dbg(vhost, "Channel Setup succeeded\n"); flags = be32_to_cpu(setup->flags); vhost->do_enquiry = 0; active_queues = be32_to_cpu(setup->num_scsi_subq_channels); scrqs->active_queues = active_queues; if (flags & IBMVFC_CHANNELS_CANCELED) { ibmvfc_dbg(vhost, "Channels Canceled\n"); vhost->using_channels = 0; } else { if (active_queues) vhost->using_channels = 1; for (i = 0; i < active_queues; i++) scrqs->scrqs[i].vios_cookie = be64_to_cpu(setup->channel_handles[i]); ibmvfc_dbg(vhost, "Using %u channels\n", vhost->scsi_scrqs.active_queues); } break; case IBMVFC_MAD_FAILED: level += ibmvfc_retry_host_init(vhost); ibmvfc_log(vhost, level, "Channel Setup failed\n"); fallthrough; case IBMVFC_MAD_DRIVER_FAILED: return; default: dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", mad_status); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); return; } ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); wake_up(&vhost->work_wait_q); } static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) { struct ibmvfc_channel_setup_mad *mad; struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); struct ibmvfc_channels *scrqs = &vhost->scsi_scrqs; unsigned int num_channels = min(scrqs->desired_queues, vhost->max_vios_scsi_channels); int level = IBMVFC_DEFAULT_LOG_LEVEL; int i; if (!evt) { ibmvfc_log(vhost, level, "Channel Setup failed: no available events\n"); ibmvfc_hard_reset_host(vhost); return; } memset(setup_buf, 0, sizeof(*setup_buf)); if (num_channels == 0) setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); else { setup_buf->num_scsi_subq_channels = cpu_to_be32(num_channels); for (i = 0; i < num_channels; i++) setup_buf->channel_handles[i] = cpu_to_be64(scrqs->scrqs[i].cookie); } ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); mad = &evt->iu.channel_setup; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); mad->common.length = cpu_to_be16(sizeof(*mad)); mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) ibmvfc_dbg(vhost, "Sent channel setup\n"); else ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); } static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; u32 mad_status = be16_to_cpu(rsp->common.status); int level = IBMVFC_DEFAULT_LOG_LEVEL; switch (mad_status) { case IBMVFC_MAD_SUCCESS: ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); ibmvfc_free_event(evt); break; case IBMVFC_MAD_FAILED: level += ibmvfc_retry_host_init(vhost); ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); fallthrough; case IBMVFC_MAD_DRIVER_FAILED: ibmvfc_free_event(evt); return; default: dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", mad_status); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); ibmvfc_free_event(evt); return; } ibmvfc_channel_setup(vhost); } static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) { struct ibmvfc_channel_enquiry *mad; struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); int level = IBMVFC_DEFAULT_LOG_LEVEL; if (!evt) { ibmvfc_log(vhost, level, "Channel Enquiry failed: no available events\n"); ibmvfc_hard_reset_host(vhost); return; } ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); mad = &evt->iu.channel_enquiry; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); mad->common.length = cpu_to_be16(sizeof(*mad)); if (mig_channels_only) mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); if (mig_no_less_channels) mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) ibmvfc_dbg(vhost, "Send channel enquiry\n"); else ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); } /** * ibmvfc_npiv_login_done - Completion handler for NPIV Login * @evt: ibmvfc event struct * **/ static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_login.common.status); struct ibmvfc_npiv_login_resp *rsp = &vhost->login_buf->resp; unsigned int npiv_max_sectors; int level = IBMVFC_DEFAULT_LOG_LEVEL; switch (mad_status) { case IBMVFC_MAD_SUCCESS: ibmvfc_free_event(evt); break; case IBMVFC_MAD_FAILED: if (ibmvfc_retry_cmd(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error))) level += ibmvfc_retry_host_init(vhost); else ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); ibmvfc_log(vhost, level, "NPIV Login failed: %s (%x:%x)\n", ibmvfc_get_cmd_error(be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)), be16_to_cpu(rsp->status), be16_to_cpu(rsp->error)); ibmvfc_free_event(evt); return; case IBMVFC_MAD_CRQ_ERROR: ibmvfc_retry_host_init(vhost); fallthrough; case IBMVFC_MAD_DRIVER_FAILED: ibmvfc_free_event(evt); return; default: dev_err(vhost->dev, "Invalid NPIV Login response: 0x%x\n", mad_status); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); ibmvfc_free_event(evt); return; } vhost->client_migrated = 0; if (!(be32_to_cpu(rsp->flags) & IBMVFC_NATIVE_FC)) { dev_err(vhost->dev, "Virtual adapter does not support FC. %x\n", rsp->flags); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); wake_up(&vhost->work_wait_q); return; } if (be32_to_cpu(rsp->max_cmds) <= IBMVFC_NUM_INTERNAL_REQ) { dev_err(vhost->dev, "Virtual adapter supported queue depth too small: %d\n", rsp->max_cmds); ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); wake_up(&vhost->work_wait_q); return; } vhost->logged_in = 1; npiv_max_sectors = min((uint)(be64_to_cpu(rsp->max_dma_len) >> 9), IBMVFC_MAX_SECTORS); dev_info(vhost->dev, "Host partition: %s, device: %s %s %s max sectors %u\n", rsp->partition_name, rsp->device_name, rsp->port_loc_code, rsp->drc_name, npiv_max_sectors); fc_host_fabric_name(vhost->host) = be64_to_cpu(rsp->node_name); fc_host_node_name(vhost->host) = be64_to_cpu(rsp->node_name); fc_host_port_name(vhost->host) = be64_to_cpu(rsp->port_name); fc_host_port_id(vhost->host) = be64_to_cpu(rsp->scsi_id); fc_host_port_type(vhost->host) = FC_PORTTYPE_NPIV; fc_host_supported_classes(vhost->host) = 0; if (be32_to_cpu(rsp->service_parms.class1_parms[0]) & 0x80000000) fc_host_supported_classes(vhost->host) |= FC_COS_CLASS1; if (be32_to_cpu(rsp->service_parms.class2_parms[0]) & 0x80000000) fc_host_supported_classes(vhost->host) |= FC_COS_CLASS2; if (be32_to_cpu(rsp->service_parms.class3_parms[0]) & 0x80000000) fc_host_supported_classes(vhost->host) |= FC_COS_CLASS3; fc_host_maxframe_size(vhost->host) = be16_to_cpu(rsp->service_parms.common.bb_rcv_sz) & 0x0fff; vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; vhost->host->max_sectors = npiv_max_sectors; if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { ibmvfc_channel_enquiry(vhost); } else { vhost->do_enquiry = 0; ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); wake_up(&vhost->work_wait_q); } } /** * ibmvfc_npiv_login - Sends NPIV login * @vhost: ibmvfc host struct * **/ static void ibmvfc_npiv_login(struct ibmvfc_host *vhost) { struct ibmvfc_npiv_login_mad *mad; struct ibmvfc_event *evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_dbg(vhost, "NPIV Login failed: no available events\n"); ibmvfc_hard_reset_host(vhost); return; } ibmvfc_gather_partition_info(vhost); ibmvfc_set_login_info(vhost); ibmvfc_init_event(evt, ibmvfc_npiv_login_done, IBMVFC_MAD_FORMAT); memcpy(vhost->login_buf, &vhost->login_info, sizeof(vhost->login_info)); mad = &evt->iu.npiv_login; memset(mad, 0, sizeof(struct ibmvfc_npiv_login_mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGIN); mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_login_mad)); mad->buffer.va = cpu_to_be64(vhost->login_buf_dma); mad->buffer.len = cpu_to_be32(sizeof(*vhost->login_buf)); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) ibmvfc_dbg(vhost, "Sent NPIV login\n"); else ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); } /** * ibmvfc_npiv_logout_done - Completion handler for NPIV Logout * @evt: ibmvfc event struct * **/ static void ibmvfc_npiv_logout_done(struct ibmvfc_event *evt) { struct ibmvfc_host *vhost = evt->vhost; u32 mad_status = be16_to_cpu(evt->xfer_iu->npiv_logout.common.status); ibmvfc_free_event(evt); switch (mad_status) { case IBMVFC_MAD_SUCCESS: if (list_empty(&vhost->crq.sent) && vhost->action == IBMVFC_HOST_ACTION_LOGO_WAIT) { ibmvfc_init_host(vhost); return; } break; case IBMVFC_MAD_FAILED: case IBMVFC_MAD_NOT_SUPPORTED: case IBMVFC_MAD_CRQ_ERROR: case IBMVFC_MAD_DRIVER_FAILED: default: ibmvfc_dbg(vhost, "NPIV Logout failed. 0x%X\n", mad_status); break; } ibmvfc_hard_reset_host(vhost); } /** * ibmvfc_npiv_logout - Issue an NPIV Logout * @vhost: ibmvfc host struct * **/ static void ibmvfc_npiv_logout(struct ibmvfc_host *vhost) { struct ibmvfc_npiv_logout_mad *mad; struct ibmvfc_event *evt; evt = ibmvfc_get_reserved_event(&vhost->crq); if (!evt) { ibmvfc_dbg(vhost, "NPIV Logout failed: no available events\n"); ibmvfc_hard_reset_host(vhost); return; } ibmvfc_init_event(evt, ibmvfc_npiv_logout_done, IBMVFC_MAD_FORMAT); mad = &evt->iu.npiv_logout; memset(mad, 0, sizeof(*mad)); mad->common.version = cpu_to_be32(1); mad->common.opcode = cpu_to_be32(IBMVFC_NPIV_LOGOUT); mad->common.length = cpu_to_be16(sizeof(struct ibmvfc_npiv_logout_mad)); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_LOGO_WAIT); if (!ibmvfc_send_event(evt, vhost, default_timeout)) ibmvfc_dbg(vhost, "Sent NPIV logout\n"); else ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); } /** * ibmvfc_dev_init_to_do - Is there target initialization work to do? * @vhost: ibmvfc host struct * * Returns: * 1 if work to do / 0 if not **/ static int ibmvfc_dev_init_to_do(struct ibmvfc_host *vhost) { struct ibmvfc_target *tgt; list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_INIT || tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) return 1; } return 0; } /** * ibmvfc_dev_logo_to_do - Is there target logout work to do? * @vhost: ibmvfc host struct * * Returns: * 1 if work to do / 0 if not **/ static int ibmvfc_dev_logo_to_do(struct ibmvfc_host *vhost) { struct ibmvfc_target *tgt; list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT || tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) return 1; } return 0; } /** * __ibmvfc_work_to_do - Is there task level work to do? (no locking) * @vhost: ibmvfc host struct * * Returns: * 1 if work to do / 0 if not **/ static int __ibmvfc_work_to_do(struct ibmvfc_host *vhost) { struct ibmvfc_target *tgt; if (kthread_should_stop()) return 1; switch (vhost->action) { case IBMVFC_HOST_ACTION_NONE: case IBMVFC_HOST_ACTION_INIT_WAIT: case IBMVFC_HOST_ACTION_LOGO_WAIT: return 0; case IBMVFC_HOST_ACTION_TGT_INIT: case IBMVFC_HOST_ACTION_QUERY_TGTS: if (vhost->discovery_threads == disc_threads) return 0; list_for_each_entry(tgt, &vhost->targets, queue) if (tgt->action == IBMVFC_TGT_ACTION_INIT) return 1; list_for_each_entry(tgt, &vhost->targets, queue) if (tgt->action == IBMVFC_TGT_ACTION_INIT_WAIT) return 0; return 1; case IBMVFC_HOST_ACTION_TGT_DEL: case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: if (vhost->discovery_threads == disc_threads) return 0; list_for_each_entry(tgt, &vhost->targets, queue) if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) return 1; list_for_each_entry(tgt, &vhost->targets, queue) if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT_WAIT) return 0; return 1; case IBMVFC_HOST_ACTION_LOGO: case IBMVFC_HOST_ACTION_INIT: case IBMVFC_HOST_ACTION_ALLOC_TGTS: case IBMVFC_HOST_ACTION_QUERY: case IBMVFC_HOST_ACTION_RESET: case IBMVFC_HOST_ACTION_REENABLE: default: break; } return 1; } /** * ibmvfc_work_to_do - Is there task level work to do? * @vhost: ibmvfc host struct * * Returns: * 1 if work to do / 0 if not **/ static int ibmvfc_work_to_do(struct ibmvfc_host *vhost) { unsigned long flags; int rc; spin_lock_irqsave(vhost->host->host_lock, flags); rc = __ibmvfc_work_to_do(vhost); spin_unlock_irqrestore(vhost->host->host_lock, flags); return rc; } /** * ibmvfc_log_ae - Log async events if necessary * @vhost: ibmvfc host struct * @events: events to log * **/ static void ibmvfc_log_ae(struct ibmvfc_host *vhost, int events) { if (events & IBMVFC_AE_RSCN) fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_RSCN, 0); if ((events & IBMVFC_AE_LINKDOWN) && vhost->state >= IBMVFC_HALTED) fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKDOWN, 0); if ((events & IBMVFC_AE_LINKUP) && vhost->state == IBMVFC_INITIALIZING) fc_host_post_event(vhost->host, fc_get_event_number(), FCH_EVT_LINKUP, 0); } /** * ibmvfc_tgt_add_rport - Tell the FC transport about a new remote port * @tgt: ibmvfc target struct * **/ static void ibmvfc_tgt_add_rport(struct ibmvfc_target *tgt) { struct ibmvfc_host *vhost = tgt->vhost; struct fc_rport *rport; unsigned long flags; tgt_dbg(tgt, "Adding rport\n"); rport = fc_remote_port_add(vhost->host, 0, &tgt->ids); spin_lock_irqsave(vhost->host->host_lock, flags); if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { tgt_dbg(tgt, "Deleting rport\n"); list_del(&tgt->queue); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); spin_unlock_irqrestore(vhost->host->host_lock, flags); fc_remote_port_delete(rport); del_timer_sync(&tgt->timer); kref_put(&tgt->kref, ibmvfc_release_tgt); return; } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { tgt_dbg(tgt, "Deleting rport with outstanding I/O\n"); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); tgt->rport = NULL; tgt->init_retries = 0; spin_unlock_irqrestore(vhost->host->host_lock, flags); fc_remote_port_delete(rport); return; } else if (rport && tgt->action == IBMVFC_TGT_ACTION_DELETED_RPORT) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return; } if (rport) { tgt_dbg(tgt, "rport add succeeded\n"); tgt->rport = rport; rport->maxframe_size = be16_to_cpu(tgt->service_parms.common.bb_rcv_sz) & 0x0fff; rport->supported_classes = 0; tgt->target_id = rport->scsi_target_id; if (be32_to_cpu(tgt->service_parms.class1_parms[0]) & 0x80000000) rport->supported_classes |= FC_COS_CLASS1; if (be32_to_cpu(tgt->service_parms.class2_parms[0]) & 0x80000000) rport->supported_classes |= FC_COS_CLASS2; if (be32_to_cpu(tgt->service_parms.class3_parms[0]) & 0x80000000) rport->supported_classes |= FC_COS_CLASS3; if (rport->rqst_q) blk_queue_max_segments(rport->rqst_q, 1); } else tgt_dbg(tgt, "rport add failed\n"); spin_unlock_irqrestore(vhost->host->host_lock, flags); } /** * ibmvfc_do_work - Do task level work * @vhost: ibmvfc host struct * **/ static void ibmvfc_do_work(struct ibmvfc_host *vhost) { struct ibmvfc_target *tgt; unsigned long flags; struct fc_rport *rport; LIST_HEAD(purge); int rc; ibmvfc_log_ae(vhost, vhost->events_to_log); spin_lock_irqsave(vhost->host->host_lock, flags); vhost->events_to_log = 0; switch (vhost->action) { case IBMVFC_HOST_ACTION_NONE: case IBMVFC_HOST_ACTION_LOGO_WAIT: case IBMVFC_HOST_ACTION_INIT_WAIT: break; case IBMVFC_HOST_ACTION_RESET: list_splice_init(&vhost->purge, &purge); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_complete_purge(&purge); rc = ibmvfc_reset_crq(vhost); spin_lock_irqsave(vhost->host->host_lock, flags); if (!rc || rc == H_CLOSED) vio_enable_interrupts(to_vio_dev(vhost->dev)); if (vhost->action == IBMVFC_HOST_ACTION_RESET) { /* * The only action we could have changed to would have * been reenable, in which case, we skip the rest of * this path and wait until we've done the re-enable * before sending the crq init. */ vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; if (rc || (rc = ibmvfc_send_crq_init(vhost)) || (rc = vio_enable_interrupts(to_vio_dev(vhost->dev)))) { ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); dev_err(vhost->dev, "Error after reset (rc=%d)\n", rc); } } break; case IBMVFC_HOST_ACTION_REENABLE: list_splice_init(&vhost->purge, &purge); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_complete_purge(&purge); rc = ibmvfc_reenable_crq_queue(vhost); spin_lock_irqsave(vhost->host->host_lock, flags); if (vhost->action == IBMVFC_HOST_ACTION_REENABLE) { /* * The only action we could have changed to would have * been reset, in which case, we skip the rest of this * path and wait until we've done the reset before * sending the crq init. */ vhost->action = IBMVFC_HOST_ACTION_TGT_DEL; if (rc || (rc = ibmvfc_send_crq_init(vhost))) { ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); dev_err(vhost->dev, "Error after enable (rc=%d)\n", rc); } } break; case IBMVFC_HOST_ACTION_LOGO: vhost->job_step(vhost); break; case IBMVFC_HOST_ACTION_INIT: BUG_ON(vhost->state != IBMVFC_INITIALIZING); if (vhost->delay_init) { vhost->delay_init = 0; spin_unlock_irqrestore(vhost->host->host_lock, flags); ssleep(15); return; } else vhost->job_step(vhost); break; case IBMVFC_HOST_ACTION_QUERY: list_for_each_entry(tgt, &vhost->targets, queue) ibmvfc_init_tgt(tgt, ibmvfc_tgt_query_target); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY_TGTS); break; case IBMVFC_HOST_ACTION_QUERY_TGTS: list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_INIT) { tgt->job_step(tgt); break; } } if (!ibmvfc_dev_init_to_do(vhost)) ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL); break; case IBMVFC_HOST_ACTION_TGT_DEL: case IBMVFC_HOST_ACTION_TGT_DEL_FAILED: list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_LOGOUT_RPORT) { tgt->job_step(tgt); break; } } if (ibmvfc_dev_logo_to_do(vhost)) { spin_unlock_irqrestore(vhost->host->host_lock, flags); return; } list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_DEL_RPORT) { tgt_dbg(tgt, "Deleting rport\n"); rport = tgt->rport; tgt->rport = NULL; list_del(&tgt->queue); ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_DELETED_RPORT); spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rport) fc_remote_port_delete(rport); del_timer_sync(&tgt->timer); kref_put(&tgt->kref, ibmvfc_release_tgt); return; } else if (tgt->action == IBMVFC_TGT_ACTION_DEL_AND_LOGOUT_RPORT) { tgt_dbg(tgt, "Deleting rport with I/O outstanding\n"); rport = tgt->rport; tgt->rport = NULL; tgt->init_retries = 0; ibmvfc_set_tgt_action(tgt, IBMVFC_TGT_ACTION_LOGOUT_DELETED_RPORT); /* * If fast fail is enabled, we wait for it to fire and then clean up * the old port, since we expect the fast fail timer to clean up the * outstanding I/O faster than waiting for normal command timeouts. * However, if fast fail is disabled, any I/O outstanding to the * rport LUNs will stay outstanding indefinitely, since the EH handlers * won't get invoked for I/O's timing out. If this is a NPIV failover * scenario, the better alternative is to use the move login. */ if (rport && rport->fast_io_fail_tmo == -1) tgt->move_login = 1; spin_unlock_irqrestore(vhost->host->host_lock, flags); if (rport) fc_remote_port_delete(rport); return; } } if (vhost->state == IBMVFC_INITIALIZING) { if (vhost->action == IBMVFC_HOST_ACTION_TGT_DEL_FAILED) { if (vhost->reinit) { vhost->reinit = 0; scsi_block_requests(vhost->host); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); spin_unlock_irqrestore(vhost->host->host_lock, flags); } else { ibmvfc_set_host_state(vhost, IBMVFC_ACTIVE); ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); wake_up(&vhost->init_wait_q); schedule_work(&vhost->rport_add_work_q); vhost->init_retries = 0; spin_unlock_irqrestore(vhost->host->host_lock, flags); scsi_unblock_requests(vhost->host); } return; } else { ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT); vhost->job_step = ibmvfc_discover_targets; } } else { ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_NONE); spin_unlock_irqrestore(vhost->host->host_lock, flags); scsi_unblock_requests(vhost->host); wake_up(&vhost->init_wait_q); return; } break; case IBMVFC_HOST_ACTION_ALLOC_TGTS: ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_INIT); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_alloc_targets(vhost); spin_lock_irqsave(vhost->host->host_lock, flags); break; case IBMVFC_HOST_ACTION_TGT_INIT: list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->action == IBMVFC_TGT_ACTION_INIT) { tgt->job_step(tgt); break; } } if (!ibmvfc_dev_init_to_do(vhost)) ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_TGT_DEL_FAILED); break; default: break; } spin_unlock_irqrestore(vhost->host->host_lock, flags); } /** * ibmvfc_work - Do task level work * @data: ibmvfc host struct * * Returns: * zero **/ static int ibmvfc_work(void *data) { struct ibmvfc_host *vhost = data; int rc; set_user_nice(current, MIN_NICE); while (1) { rc = wait_event_interruptible(vhost->work_wait_q, ibmvfc_work_to_do(vhost)); BUG_ON(rc); if (kthread_should_stop()) break; ibmvfc_do_work(vhost); } ibmvfc_dbg(vhost, "ibmvfc kthread exiting...\n"); return 0; } /** * ibmvfc_alloc_queue - Allocate queue * @vhost: ibmvfc host struct * @queue: ibmvfc queue to allocate * @fmt: queue format to allocate * * Returns: * 0 on success / non-zero on failure **/ static int ibmvfc_alloc_queue(struct ibmvfc_host *vhost, struct ibmvfc_queue *queue, enum ibmvfc_msg_fmt fmt) { struct device *dev = vhost->dev; size_t fmt_size; ENTER; spin_lock_init(&queue->_lock); queue->q_lock = &queue->_lock; switch (fmt) { case IBMVFC_CRQ_FMT: fmt_size = sizeof(*queue->msgs.crq); queue->total_depth = scsi_qdepth + IBMVFC_NUM_INTERNAL_REQ; queue->evt_depth = scsi_qdepth; queue->reserved_depth = IBMVFC_NUM_INTERNAL_REQ; break; case IBMVFC_ASYNC_FMT: fmt_size = sizeof(*queue->msgs.async); break; case IBMVFC_SUB_CRQ_FMT: fmt_size = sizeof(*queue->msgs.scrq); /* We need one extra event for Cancel Commands */ queue->total_depth = scsi_qdepth + IBMVFC_NUM_INTERNAL_SUBQ_REQ; queue->evt_depth = scsi_qdepth; queue->reserved_depth = IBMVFC_NUM_INTERNAL_SUBQ_REQ; break; default: dev_warn(dev, "Unknown command/response queue message format: %d\n", fmt); return -EINVAL; } queue->fmt = fmt; if (ibmvfc_init_event_pool(vhost, queue)) { dev_err(dev, "Couldn't initialize event pool.\n"); return -ENOMEM; } queue->msgs.handle = (void *)get_zeroed_page(GFP_KERNEL); if (!queue->msgs.handle) return -ENOMEM; queue->msg_token = dma_map_single(dev, queue->msgs.handle, PAGE_SIZE, DMA_BIDIRECTIONAL); if (dma_mapping_error(dev, queue->msg_token)) { free_page((unsigned long)queue->msgs.handle); queue->msgs.handle = NULL; return -ENOMEM; } queue->cur = 0; queue->size = PAGE_SIZE / fmt_size; queue->vhost = vhost; return 0; } /** * ibmvfc_init_crq - Initializes and registers CRQ with hypervisor * @vhost: ibmvfc host struct * * Allocates a page for messages, maps it for dma, and registers * the crq with the hypervisor. * * Return value: * zero on success / other on failure **/ static int ibmvfc_init_crq(struct ibmvfc_host *vhost) { int rc, retrc = -ENOMEM; struct device *dev = vhost->dev; struct vio_dev *vdev = to_vio_dev(dev); struct ibmvfc_queue *crq = &vhost->crq; ENTER; if (ibmvfc_alloc_queue(vhost, crq, IBMVFC_CRQ_FMT)) return -ENOMEM; retrc = rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, crq->msg_token, PAGE_SIZE); if (rc == H_RESOURCE) /* maybe kexecing and resource is busy. try a reset */ retrc = rc = ibmvfc_reset_crq(vhost); if (rc == H_CLOSED) dev_warn(dev, "Partner adapter not ready\n"); else if (rc) { dev_warn(dev, "Error %d opening adapter\n", rc); goto reg_crq_failed; } retrc = 0; tasklet_init(&vhost->tasklet, (void *)ibmvfc_tasklet, (unsigned long)vhost); if ((rc = request_irq(vdev->irq, ibmvfc_interrupt, 0, IBMVFC_NAME, vhost))) { dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", vdev->irq, rc); goto req_irq_failed; } if ((rc = vio_enable_interrupts(vdev))) { dev_err(dev, "Error %d enabling interrupts\n", rc); goto req_irq_failed; } LEAVE; return retrc; req_irq_failed: tasklet_kill(&vhost->tasklet); do { rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); reg_crq_failed: ibmvfc_free_queue(vhost, crq); return retrc; } static int ibmvfc_register_channel(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels, int index) { struct device *dev = vhost->dev; struct vio_dev *vdev = to_vio_dev(dev); struct ibmvfc_queue *scrq = &channels->scrqs[index]; int rc = -ENOMEM; ENTER; rc = h_reg_sub_crq(vdev->unit_address, scrq->msg_token, PAGE_SIZE, &scrq->cookie, &scrq->hw_irq); /* H_CLOSED indicates successful register, but no CRQ partner */ if (rc && rc != H_CLOSED) { dev_warn(dev, "Error registering sub-crq: %d\n", rc); if (rc == H_PARAMETER) dev_warn_once(dev, "Firmware may not support MQ\n"); goto reg_failed; } scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); if (!scrq->irq) { rc = -EINVAL; dev_err(dev, "Error mapping sub-crq[%d] irq\n", index); goto irq_failed; } switch (channels->protocol) { case IBMVFC_PROTO_SCSI: snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-scsi%d", vdev->unit_address, index); scrq->handler = ibmvfc_interrupt_mq; break; case IBMVFC_PROTO_NVME: snprintf(scrq->name, sizeof(scrq->name), "ibmvfc-%x-nvmf%d", vdev->unit_address, index); scrq->handler = ibmvfc_interrupt_mq; break; default: dev_err(dev, "Unknown channel protocol (%d)\n", channels->protocol); goto irq_failed; } rc = request_irq(scrq->irq, scrq->handler, 0, scrq->name, scrq); if (rc) { dev_err(dev, "Couldn't register sub-crq[%d] irq\n", index); irq_dispose_mapping(scrq->irq); goto irq_failed; } scrq->hwq_id = index; LEAVE; return 0; irq_failed: do { rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); reg_failed: LEAVE; return rc; } static void ibmvfc_deregister_channel(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels, int index) { struct device *dev = vhost->dev; struct vio_dev *vdev = to_vio_dev(dev); struct ibmvfc_queue *scrq = &channels->scrqs[index]; long rc; ENTER; free_irq(scrq->irq, scrq); irq_dispose_mapping(scrq->irq); scrq->irq = 0; do { rc = plpar_hcall_norets(H_FREE_SUB_CRQ, vdev->unit_address, scrq->cookie); } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); if (rc) dev_err(dev, "Failed to free sub-crq[%d]: rc=%ld\n", index, rc); /* Clean out the queue */ memset(scrq->msgs.crq, 0, PAGE_SIZE); scrq->cur = 0; LEAVE; } static void ibmvfc_reg_sub_crqs(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels) { int i, j; ENTER; if (!vhost->mq_enabled || !channels->scrqs) return; for (i = 0; i < channels->max_queues; i++) { if (ibmvfc_register_channel(vhost, channels, i)) { for (j = i; j > 0; j--) ibmvfc_deregister_channel(vhost, channels, j - 1); vhost->do_enquiry = 0; return; } } LEAVE; } static void ibmvfc_dereg_sub_crqs(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels) { int i; ENTER; if (!vhost->mq_enabled || !channels->scrqs) return; for (i = 0; i < channels->max_queues; i++) ibmvfc_deregister_channel(vhost, channels, i); LEAVE; } static int ibmvfc_alloc_channels(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels) { struct ibmvfc_queue *scrq; int i, j; int rc = 0; channels->scrqs = kcalloc(channels->max_queues, sizeof(*channels->scrqs), GFP_KERNEL); if (!channels->scrqs) return -ENOMEM; for (i = 0; i < channels->max_queues; i++) { scrq = &channels->scrqs[i]; rc = ibmvfc_alloc_queue(vhost, scrq, IBMVFC_SUB_CRQ_FMT); if (rc) { for (j = i; j > 0; j--) { scrq = &channels->scrqs[j - 1]; ibmvfc_free_queue(vhost, scrq); } kfree(channels->scrqs); channels->scrqs = NULL; channels->active_queues = 0; return rc; } } return rc; } static void ibmvfc_init_sub_crqs(struct ibmvfc_host *vhost) { ENTER; if (!vhost->mq_enabled) return; if (ibmvfc_alloc_channels(vhost, &vhost->scsi_scrqs)) { vhost->do_enquiry = 0; vhost->mq_enabled = 0; return; } ibmvfc_reg_sub_crqs(vhost, &vhost->scsi_scrqs); LEAVE; } static void ibmvfc_release_channels(struct ibmvfc_host *vhost, struct ibmvfc_channels *channels) { struct ibmvfc_queue *scrq; int i; if (channels->scrqs) { for (i = 0; i < channels->max_queues; i++) { scrq = &channels->scrqs[i]; ibmvfc_free_queue(vhost, scrq); } kfree(channels->scrqs); channels->scrqs = NULL; channels->active_queues = 0; } } static void ibmvfc_release_sub_crqs(struct ibmvfc_host *vhost) { ENTER; if (!vhost->scsi_scrqs.scrqs) return; ibmvfc_dereg_sub_crqs(vhost, &vhost->scsi_scrqs); ibmvfc_release_channels(vhost, &vhost->scsi_scrqs); LEAVE; } static void ibmvfc_free_disc_buf(struct device *dev, struct ibmvfc_channels *channels) { dma_free_coherent(dev, channels->disc_buf_sz, channels->disc_buf, channels->disc_buf_dma); } /** * ibmvfc_free_mem - Free memory for vhost * @vhost: ibmvfc host struct * * Return value: * none **/ static void ibmvfc_free_mem(struct ibmvfc_host *vhost) { struct ibmvfc_queue *async_q = &vhost->async_crq; ENTER; mempool_destroy(vhost->tgt_pool); kfree(vhost->trace); ibmvfc_free_disc_buf(vhost->dev, &vhost->scsi_scrqs); dma_free_coherent(vhost->dev, sizeof(*vhost->login_buf), vhost->login_buf, vhost->login_buf_dma); dma_free_coherent(vhost->dev, sizeof(*vhost->channel_setup_buf), vhost->channel_setup_buf, vhost->channel_setup_dma); dma_pool_destroy(vhost->sg_pool); ibmvfc_free_queue(vhost, async_q); LEAVE; } static int ibmvfc_alloc_disc_buf(struct device *dev, struct ibmvfc_channels *channels) { channels->disc_buf_sz = sizeof(*channels->disc_buf) * max_targets; channels->disc_buf = dma_alloc_coherent(dev, channels->disc_buf_sz, &channels->disc_buf_dma, GFP_KERNEL); if (!channels->disc_buf) { dev_err(dev, "Couldn't allocate %s Discover Targets buffer\n", (channels->protocol == IBMVFC_PROTO_SCSI) ? "SCSI" : "NVMe"); return -ENOMEM; } return 0; } /** * ibmvfc_alloc_mem - Allocate memory for vhost * @vhost: ibmvfc host struct * * Return value: * 0 on success / non-zero on failure **/ static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) { struct ibmvfc_queue *async_q = &vhost->async_crq; struct device *dev = vhost->dev; ENTER; if (ibmvfc_alloc_queue(vhost, async_q, IBMVFC_ASYNC_FMT)) { dev_err(dev, "Couldn't allocate/map async queue.\n"); goto nomem; } vhost->sg_pool = dma_pool_create(IBMVFC_NAME, dev, SG_ALL * sizeof(struct srp_direct_buf), sizeof(struct srp_direct_buf), 0); if (!vhost->sg_pool) { dev_err(dev, "Failed to allocate sg pool\n"); goto unmap_async_crq; } vhost->login_buf = dma_alloc_coherent(dev, sizeof(*vhost->login_buf), &vhost->login_buf_dma, GFP_KERNEL); if (!vhost->login_buf) { dev_err(dev, "Couldn't allocate NPIV login buffer\n"); goto free_sg_pool; } if (ibmvfc_alloc_disc_buf(dev, &vhost->scsi_scrqs)) goto free_login_buffer; vhost->trace = kcalloc(IBMVFC_NUM_TRACE_ENTRIES, sizeof(struct ibmvfc_trace_entry), GFP_KERNEL); atomic_set(&vhost->trace_index, -1); if (!vhost->trace) goto free_scsi_disc_buffer; vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ, sizeof(struct ibmvfc_target)); if (!vhost->tgt_pool) { dev_err(dev, "Couldn't allocate target memory pool\n"); goto free_trace; } vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), &vhost->channel_setup_dma, GFP_KERNEL); if (!vhost->channel_setup_buf) { dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); goto free_tgt_pool; } LEAVE; return 0; free_tgt_pool: mempool_destroy(vhost->tgt_pool); free_trace: kfree(vhost->trace); free_scsi_disc_buffer: ibmvfc_free_disc_buf(dev, &vhost->scsi_scrqs); free_login_buffer: dma_free_coherent(dev, sizeof(*vhost->login_buf), vhost->login_buf, vhost->login_buf_dma); free_sg_pool: dma_pool_destroy(vhost->sg_pool); unmap_async_crq: ibmvfc_free_queue(vhost, async_q); nomem: LEAVE; return -ENOMEM; } /** * ibmvfc_rport_add_thread - Worker thread for rport adds * @work: work struct * **/ static void ibmvfc_rport_add_thread(struct work_struct *work) { struct ibmvfc_host *vhost = container_of(work, struct ibmvfc_host, rport_add_work_q); struct ibmvfc_target *tgt; struct fc_rport *rport; unsigned long flags; int did_work; ENTER; spin_lock_irqsave(vhost->host->host_lock, flags); do { did_work = 0; if (vhost->state != IBMVFC_ACTIVE) break; list_for_each_entry(tgt, &vhost->targets, queue) { if (tgt->add_rport) { did_work = 1; tgt->add_rport = 0; kref_get(&tgt->kref); rport = tgt->rport; if (!rport) { spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_tgt_add_rport(tgt); } else if (get_device(&rport->dev)) { spin_unlock_irqrestore(vhost->host->host_lock, flags); tgt_dbg(tgt, "Setting rport roles\n"); fc_remote_port_rolechg(rport, tgt->ids.roles); put_device(&rport->dev); } else { spin_unlock_irqrestore(vhost->host->host_lock, flags); } kref_put(&tgt->kref, ibmvfc_release_tgt); spin_lock_irqsave(vhost->host->host_lock, flags); break; } } } while(did_work); if (vhost->state == IBMVFC_ACTIVE) vhost->scan_complete = 1; spin_unlock_irqrestore(vhost->host->host_lock, flags); LEAVE; } /** * ibmvfc_probe - Adapter hot plug add entry point * @vdev: vio device struct * @id: vio device id struct * * Return value: * 0 on success / non-zero on failure **/ static int ibmvfc_probe(struct vio_dev *vdev, const struct vio_device_id *id) { struct ibmvfc_host *vhost; struct Scsi_Host *shost; struct device *dev = &vdev->dev; int rc = -ENOMEM; unsigned int online_cpus = num_online_cpus(); unsigned int max_scsi_queues = min((unsigned int)IBMVFC_MAX_SCSI_QUEUES, online_cpus); ENTER; shost = scsi_host_alloc(&driver_template, sizeof(*vhost)); if (!shost) { dev_err(dev, "Couldn't allocate host data\n"); goto out; } shost->transportt = ibmvfc_transport_template; shost->can_queue = scsi_qdepth; shost->max_lun = max_lun; shost->max_id = max_targets; shost->max_sectors = IBMVFC_MAX_SECTORS; shost->max_cmd_len = IBMVFC_MAX_CDB_LEN; shost->unique_id = shost->host_no; shost->nr_hw_queues = mq_enabled ? min(max_scsi_queues, nr_scsi_hw_queues) : 1; vhost = shost_priv(shost); INIT_LIST_HEAD(&vhost->targets); INIT_LIST_HEAD(&vhost->purge); sprintf(vhost->name, IBMVFC_NAME); vhost->host = shost; vhost->dev = dev; vhost->partition_number = -1; vhost->log_level = log_level; vhost->task_set = 1; vhost->mq_enabled = mq_enabled; vhost->scsi_scrqs.desired_queues = min(shost->nr_hw_queues, nr_scsi_channels); vhost->scsi_scrqs.max_queues = shost->nr_hw_queues; vhost->scsi_scrqs.protocol = IBMVFC_PROTO_SCSI; vhost->using_channels = 0; vhost->do_enquiry = 1; vhost->scan_timeout = 0; strcpy(vhost->partition_name, "UNKNOWN"); init_waitqueue_head(&vhost->work_wait_q); init_waitqueue_head(&vhost->init_wait_q); INIT_WORK(&vhost->rport_add_work_q, ibmvfc_rport_add_thread); mutex_init(&vhost->passthru_mutex); if ((rc = ibmvfc_alloc_mem(vhost))) goto free_scsi_host; vhost->work_thread = kthread_run(ibmvfc_work, vhost, "%s_%d", IBMVFC_NAME, shost->host_no); if (IS_ERR(vhost->work_thread)) { dev_err(dev, "Couldn't create kernel thread: %ld\n", PTR_ERR(vhost->work_thread)); rc = PTR_ERR(vhost->work_thread); goto free_host_mem; } if ((rc = ibmvfc_init_crq(vhost))) { dev_err(dev, "Couldn't initialize crq. rc=%d\n", rc); goto kill_kthread; } if ((rc = scsi_add_host(shost, dev))) goto release_crq; fc_host_dev_loss_tmo(shost) = IBMVFC_DEV_LOSS_TMO; if ((rc = ibmvfc_create_trace_file(&shost->shost_dev.kobj, &ibmvfc_trace_attr))) { dev_err(dev, "Failed to create trace file. rc=%d\n", rc); goto remove_shost; } ibmvfc_init_sub_crqs(vhost); if (shost_to_fc_host(shost)->rqst_q) blk_queue_max_segments(shost_to_fc_host(shost)->rqst_q, 1); dev_set_drvdata(dev, vhost); spin_lock(&ibmvfc_driver_lock); list_add_tail(&vhost->queue, &ibmvfc_head); spin_unlock(&ibmvfc_driver_lock); ibmvfc_send_crq_init(vhost); scsi_scan_host(shost); return 0; remove_shost: scsi_remove_host(shost); release_crq: ibmvfc_release_crq_queue(vhost); kill_kthread: kthread_stop(vhost->work_thread); free_host_mem: ibmvfc_free_mem(vhost); free_scsi_host: scsi_host_put(shost); out: LEAVE; return rc; } /** * ibmvfc_remove - Adapter hot plug remove entry point * @vdev: vio device struct * * Return value: * 0 **/ static void ibmvfc_remove(struct vio_dev *vdev) { struct ibmvfc_host *vhost = dev_get_drvdata(&vdev->dev); LIST_HEAD(purge); unsigned long flags; ENTER; ibmvfc_remove_trace_file(&vhost->host->shost_dev.kobj, &ibmvfc_trace_attr); spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_link_down(vhost, IBMVFC_HOST_OFFLINE); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_wait_while_resetting(vhost); kthread_stop(vhost->work_thread); fc_remove_host(vhost->host); scsi_remove_host(vhost->host); spin_lock_irqsave(vhost->host->host_lock, flags); ibmvfc_purge_requests(vhost, DID_ERROR); list_splice_init(&vhost->purge, &purge); spin_unlock_irqrestore(vhost->host->host_lock, flags); ibmvfc_complete_purge(&purge); ibmvfc_release_sub_crqs(vhost); ibmvfc_release_crq_queue(vhost); ibmvfc_free_mem(vhost); spin_lock(&ibmvfc_driver_lock); list_del(&vhost->queue); spin_unlock(&ibmvfc_driver_lock); scsi_host_put(vhost->host); LEAVE; } /** * ibmvfc_resume - Resume from suspend * @dev: device struct * * We may have lost an interrupt across suspend/resume, so kick the * interrupt handler * */ static int ibmvfc_resume(struct device *dev) { unsigned long flags; struct ibmvfc_host *vhost = dev_get_drvdata(dev); struct vio_dev *vdev = to_vio_dev(dev); spin_lock_irqsave(vhost->host->host_lock, flags); vio_disable_interrupts(vdev); tasklet_schedule(&vhost->tasklet); spin_unlock_irqrestore(vhost->host->host_lock, flags); return 0; } /** * ibmvfc_get_desired_dma - Calculate DMA resources needed by the driver * @vdev: vio device struct * * Return value: * Number of bytes the driver will need to DMA map at the same time in * order to perform well. */ static unsigned long ibmvfc_get_desired_dma(struct vio_dev *vdev) { unsigned long pool_dma; pool_dma = (IBMVFC_MAX_SCSI_QUEUES * scsi_qdepth) * sizeof(union ibmvfc_iu); return pool_dma + ((512 * 1024) * driver_template.cmd_per_lun); } static const struct vio_device_id ibmvfc_device_table[] = { {"fcp", "IBM,vfc-client"}, { "", "" } }; MODULE_DEVICE_TABLE(vio, ibmvfc_device_table); static const struct dev_pm_ops ibmvfc_pm_ops = { .resume = ibmvfc_resume }; static struct vio_driver ibmvfc_driver = { .id_table = ibmvfc_device_table, .probe = ibmvfc_probe, .remove = ibmvfc_remove, .get_desired_dma = ibmvfc_get_desired_dma, .name = IBMVFC_NAME, .pm = &ibmvfc_pm_ops, }; static struct fc_function_template ibmvfc_transport_functions = { .show_host_fabric_name = 1, .show_host_node_name = 1, .show_host_port_name = 1, .show_host_supported_classes = 1, .show_host_port_type = 1, .show_host_port_id = 1, .show_host_maxframe_size = 1, .get_host_port_state = ibmvfc_get_host_port_state, .show_host_port_state = 1, .get_host_speed = ibmvfc_get_host_speed, .show_host_speed = 1, .issue_fc_host_lip = ibmvfc_issue_fc_host_lip, .terminate_rport_io = ibmvfc_terminate_rport_io, .show_rport_maxframe_size = 1, .show_rport_supported_classes = 1, .set_rport_dev_loss_tmo = ibmvfc_set_rport_dev_loss_tmo, .show_rport_dev_loss_tmo = 1, .get_starget_node_name = ibmvfc_get_starget_node_name, .show_starget_node_name = 1, .get_starget_port_name = ibmvfc_get_starget_port_name, .show_starget_port_name = 1, .get_starget_port_id = ibmvfc_get_starget_port_id, .show_starget_port_id = 1, .bsg_request = ibmvfc_bsg_request, .bsg_timeout = ibmvfc_bsg_timeout, }; /** * ibmvfc_module_init - Initialize the ibmvfc module * * Return value: * 0 on success / other on failure **/ static int __init ibmvfc_module_init(void) { int rc; if (!firmware_has_feature(FW_FEATURE_VIO)) return -ENODEV; printk(KERN_INFO IBMVFC_NAME": IBM Virtual Fibre Channel Driver version: %s %s\n", IBMVFC_DRIVER_VERSION, IBMVFC_DRIVER_DATE); ibmvfc_transport_template = fc_attach_transport(&ibmvfc_transport_functions); if (!ibmvfc_transport_template) return -ENOMEM; rc = vio_register_driver(&ibmvfc_driver); if (rc) fc_release_transport(ibmvfc_transport_template); return rc; } /** * ibmvfc_module_exit - Teardown the ibmvfc module * * Return value: * nothing **/ static void __exit ibmvfc_module_exit(void) { vio_unregister_driver(&ibmvfc_driver); fc_release_transport(ibmvfc_transport_template); } module_init(ibmvfc_module_init); module_exit(ibmvfc_module_exit);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1